What if Humans Are NOT Earth's First Civilization? | Silurian Hypothesis
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We’re almost certainly the first technological civilization on Earth. But what if we’re not? We are. Although how sure are we, really? The Silurian hypothesis, which asks whether pre-human industrial civilizations might have existed.
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@sethmaki1333 4 місяці тому
Reminds me of the Star Trek: Voyager episode "Distant Origin" where the hero ship happens upon an ancient civilization on the other side of the galaxy that descended from hadrosaurs that left Earth 70 million years ago.
@brennanr.697 4 місяці тому
Scrolled way to far to find a comment mentioning that episode
@TheJadeFist 4 місяці тому
Ya, but if such a society existed, even if we never found evidence of it left on earth, might we find other evidence in our solar system though? Satellites would have lost or been flung from orbit over that long period, so probably nothing there. If it existed in mars it might have completely eroded by now, or been boiled over by lava when the planet was hotter and more volcanologically active. (it's a word now with it) Maybe something still exists there and is simply buried by millions of years of rust, but might be otherwise intact, or something taking wide paths around the solar system, like an early probe the kind we send out now. That probe would be the most likely to survive I think, but good luck finding a tiny piece of metal in the whole Oort cloud you don't' even know is there.
@ianbrett3276 4 місяці тому
It's a shame that they didn't follow up that episode with more on the Vo'th species as recurring guest aliens
@UltimatePerfection 3 місяці тому
@@ianbrett3276If Prodigy is allowed to go past the second season, maybe we'll see more of them.
@bannisher 3 місяці тому
Everyone in this thread is awesome. LLAP
@enotdetcelfer 4 місяці тому
This is why we need to build a pyramid on the moon... you know future civilizations will be like, pyramids or it didn't happen.
@ngud_gaming267 3 місяці тому
One last prank before we go. True human activity
@WayneMcDougall 21 день тому
One asteroid takes it out ..
@steve29384 9 днів тому
@@WayneMcDougallsame with earth
@WayneMcDougall 9 днів тому
@@steve29384 on earth we don't wait for asteroids - just tectonic activity and erosion. The Moon is where you place your monolith.
@stephanieworkman5110 4 дні тому
@@WayneMcDougallSo you’re saying…we need two pyramids on the moon.
@Sir_Typesalot 22 дні тому
„They‘re already here, aren’t they?“ - „THEY have been here long before us, Mr. Mulder.“
@stevelyman6917 2 місяці тому
"The Brain Eaters," a 1958 horror film had a plot that revolved around an insect civilization from the Carboniferous creating a capsule to escape their refuge from deep underground. Also notable for featuring a pre-Trek Leonard Nimoy.
@Pictureperfectroof Місяць тому
Who’s making these movies? Someone knows something
@psantochi 4 місяці тому
This whole episode sounds like a bar conversation after a scientific conference. A lot of fun!
@pavelborisov515 4 місяці тому
But without a hangover and burning bottom
@petergaskin1811 4 місяці тому
Sounds like the sort of conversations I have with the World at large after the second bottle of Burgundy.
@Benson_aka_devils_advocate_88 4 місяці тому
"Back of the napkin" equations comes to mind. But this topic has always fascinated me. The chance of a civilization reaching out level of ability when it comes to leaving undeniable signs of its existence is incredibly small. However, a species that develops complex social structures and the basic ability to create shelter, and even a simple mastery of making fire, would be so difficult to detect after a few million years, let alone 100 million. It's incredibly egocentric to think we are the first "intelligent" species. After all octopuses have been around in some form or another far longer than vertebrates have. And they clearly show it doesn't take upright posture with hands and fingers to be able to solve complex problems that require complex problem solving skills. But we have yet to find anything that shows a technical advancement at our level at any time in the last half billion years, and not for a lack of trying either. So, intelligent species is highly likely. Complex social structure is probable. But no, nothing at our level has shown up in the record, _that we know of._
@billkallas1762 4 місяці тому
After everyone having three or four drinks.
@juliane__ 3 місяці тому
Except these are only wild wdreams without scientic work of a geologist behind.
@DanielVerberne 4 місяці тому
This fascinating concept brings to mind the famous sci-fi classic 'Nightfall' by Isaac Asimov and Robert Silverberg. In Nightfall, an alien race lives on a world that features not one but several suns. Each sun is up and visible at some part of the time each day and so the concept of 'darkness' is unknown and therefore terrifying to these aliens. In the story, astronomers make a prediction that a full eclipse will occur in the near future, exposing the alien civilisation to complete darkness. It is predicted that most of the aliens will go insane from the experience. Meanwhile in parallel to this storyline, the alien equivalent of geologists are exploring a dig site that uncover something shocking - a layer of carbon and ash buried under the current layer of habitation. The analysis suggest that the ash represents mass fires and destruction - of a previous 'cycle' of civilisation of that alien race. Further digs reveal something even more shocking - an undeniable pattern of wholesale civilisation destruction occurring with a definite period; over and over. It is eventually realised that the current civilisation of aliens on that planet is now 'almost due' for another collapse - and it looks like the forthcoming ultra-rare eclipse and descent into darkness may be the root of all of this. In short, Nightfall as a story contained a seed of the Silurian Hypothesis - what if our current 'advanced' civilisation isn't the first and indeed perhaps only represents the apogee of this particular 'instance' of human civilisation? Now I don't think there's any substance to that idea here on Earth, but nor do I know for sure either.
@Bitchslapper316 4 місяці тому
I think there is some evidence of it happening on earth. Why do most cultures on earth have stories dating back thousands of years about beings coming down from the sky with amazing abilities then calling them gods? How did humans spread across the globe then suddenly all develop agriculture and civilization separately at the same time? We're talking about cultures separated by thousands of miles and oceans who are thought to have had no contact. I have seen the standard answers given to these questions but they don't pass smell test for me. I think it's much more likely there was a more advanced human culture or another species a thousands of years ago that was moving humans around the planet for various purposes. Then one day were gone for whatever reason.
@justforplaylists 4 місяці тому
@@Bitchslapper316 I'd recommend a podcast called "It's Probably Not Aliens", they talk a lot about those sorts of ideas. But generally, that's selling humans short.
@Bitchslapper316 4 місяці тому
@@justforplaylists I've seen some of them. I'm not saying I believe the crap shown on ancient aliens. However there's never been an acceptable explanation of why humans decided to walk out of a cave tens of thousands of years ago and make up stories of "gods" coming down from the sky. We as modern humans try to apply our own cognitive bias to our ancestors. We see religion from our earliest memories, it's in our schools, on our TV, on the radio and all over the internet. We think believing in religion or a god is normal because in this day and age it is. We apply that same thinking to people thousands of years ago and say "oh it can't be someone actually coming from the sky, it had to be a religion!". I'm also not saying aliens built pyramids, I'm not selling humanity short. I'm saying that all of written history, legends and myths from across the planet from China to India to south America tell us about "gods" coming down from the sky.
@MirlitronOne 4 місяці тому
You've all taken Dr Who too seriously.
@Jezee213 4 місяці тому
Omg, that sounds amazing! I'm going to check it out!
@senatorchinchilla5389 4 місяці тому
I love theories like this because they really explore the vastness of time and space.
@RATKINGPLUG 3 місяці тому
Hypothesis
@MossyMozart 2 місяці тому
@@RATKINGPLUG - Speculation.
@howardhughes7596 2 місяці тому
Theories have evidence that support them, hypothesis do not.
@SPREAD-THEM 2 місяці тому
@@MossyMozart constipation
@cyberpleb2472 Місяць тому
@@howardhughes7596 *hypotheses* do not.
@davidtal523 3 місяці тому
i really enjoy these episodes that dont contain overly complex math and phsyics that i cant remotely understand. this was interesting, and fun. thank you.
@DanielVerberne 16 днів тому
I feel much the same. I have loads of curiosity about the world around us and enjoying learn - but I also feel my limits in regards to the technicalities of the underlying science. I'm definitely pro-science and much appreciate it's ability as a system of thought to enriching our knowledge, but I don't think much of my personal capacity to understand the details!
@Gnomezonbacon 4 місяці тому
There was an episode of Star Trek Voyager about this. A dinosaur civ escaped before the asteroid hit and drifted around the galaxy for millions of years until a ship from the same homeworld stumbled into them on the other side of the galaxy.
@MJG206 3 місяці тому
Distant Origin.
@MrClassicmetal 2 місяці тому
How did those creatures manage to escape before the asteroid hit?
@tmst2199 2 місяці тому
Did they make it to another planet or just live in their cars for millions of years?
@Obiter3 2 місяці тому
Was a dinosaur driving the ship?
@tmst2199 2 місяці тому
@@Rich-hy2ey Anthopologists have modern humans emerging from Africa where their ancestors were presumably pretty well-suited.
@pugofwarbr 4 місяці тому
this reminds me of the Lovecraft's stories, basically Earth was invaded by different civilizations on the course of millions of years, all them sooner of later became extincts, or devolved, or literally just ghosts remains.
@RickJaeger 3 місяці тому
Lovecraft was writing at a time where he was engrossed by the booming new scientific understanding of "deep time," he thought it was fascinating, hence incorporated into his writing a radical, scientifically-inspired understanding of just how much older the Earth is than conventional wisdom (informed by written history and literalist biblical timelines) previously suggested.
@yarpen26 Місяць тому
"At the Mountains of Madness" is my favorite Lovecraft's story, even if atypical of his writing in general (speaking of which, it's kinda weird to read such hard sci-fi coming out of a horror guy who's otherwise all about mystery and monsters). Sure, it's absurd to imagine artifical structures withstanding erosion over 30 million years, but it does serve the drama. Lovecraft is an aquired taste and while I absolutely don't recommend going through all of his stuff like I did, since much of it is pretty mediocre, especially from the 1920s, and even this story has its fair share of detractors who can't make their way through the endless paragraphs of descriptions, but if you want to pick anything by him, I'd say pick this one.
@Mma12367 Місяць тому
If this is true it will explain the war between gods in many mythologies like Anunaki ,ashura vs devas ect it can really help us cause in those mythologies they all were different species not humans
@yarpen26 Місяць тому
@@Mma12367 They're all either humans or human-like mutants. The God of Christianity in neo-Platonian interpretation is more like an alien species than any of the other guys. There is not a shred of evidence to suggest that mythologized god wars were anything other than distorted recounts of conflicts between powerful chieftains from eons past.
@Mma12367 Місяць тому
@@yarpen26 what do you mean by human mutants
@SF-fb6lv 20 днів тому
I think Silurian Hypothesis should be boiled down to: "Due to subduction, records of surface phenomena will be obscured over millennia" instead of the current: "an Industrial Civilization may have existed before humans existed". It is like modifying the belief that "A teapot might be orbiting Earth" to "It would be difficult to detect something as small as a teapot orbiting Earth".
@Beya045 3 місяці тому
Absolutely phenomenal. Watch all the way through. Thank you for a profound piece.
@S1nwar 4 місяці тому
its really frustrating to think about how hard it is to build a truly functioning timecapsule that is both reachable(and not parked in geostationary orbit), understandable(no language will survive) and mechanically/chemically stable enough
@Solnoric 4 місяці тому
There's an orbital time capsule that won't come down for a few thousand years, so I'd say that most of it is relatively easy to do and the challenge is language, and even then that's not an insurmountable hurdle.
@ericsaul9306 4 місяці тому
That should be relatively easy, you could just write in quartz but if you wanted for this to last for millions of years you should produce millions of this quartz "picture books" and store them through the world
@greenanubis 4 місяці тому
Depends on the time scale your time capsule has to survive. Thousands, easy, sticks and stones will do ya. Millions, you can do it if there is enough of people in civ. Billions, things start to get muddy. Concept of time capsule falls apart. Yea, you can have stuff that can theoretically be stable for trillions of years, but in our universe(practice) you basically have just enough time until your star goes red giant. Until stuff gets recycled on cosmic (time)scale.
@uclakirk 4 місяці тому
We’d have to go all in on the “The Inner Light” strategy and download the experiences of a middle aged man living in a dreary small town straight into the brain of a random alien passing by
@t.c.bramblett617 4 місяці тому
Indeed. It's much more satisfying for me to imagine our existence in the constantly flowing, changing, boiling exchange of matter and energy as a transient game, and to accept that even as we reach out to know more and more while we are aware.
@rhysanthony 4 місяці тому
This is why I love PBS Spacetime. They’ll cover cutting edge physics topics one day, and then give a fair look at far flung topics like the Silurian hypothesis the next. Fantastic work.
@ajchapeliere 4 місяці тому
all while being clear about what degree of fact vs speculation is going on, too!
@TylerHimothyOneJr 4 місяці тому
I think I prefer Anton Petrov personally, if you havent heard of him you should check his channel out. I will say I did enjoy this video, but tend to disagree with some of their stances in other videos
@hilohahoma4107 4 місяці тому
Yes but they are inherently biased being connected to the most nefarious misinformation paradigms the world has ever seen such as the U.S. Guv which is hiding tons of artifacts proving there WERE non human past civilizations.
@blink182bfsftw 4 місяці тому
@@TylerHimothyOneJr2wa%@❤❤❤
@hofmannwaves1525 4 місяці тому
LOL they're the most establishment-dogma show out there they hate the idea of aliens it calls anything non-material woo-woo they're the image of obnoxious close-minded modern scientists
@docnelson2008 3 місяці тому
An excellent discussion of an interesting hypothesis that many dismiss as too speculative despite, as Matt points out, is a valuable exercise for helping us understand so many questions about life on Earth and elsewhere. A marvellous channel.
@GSPV33 2 місяці тому
Appreciate all of you at PBS Spacetime, your efforts (shoutouts to the animators & editors.) I also appreciate the community here.
@jeffk3746 4 місяці тому
This is the proper way to debunk a conspiracy. Don’t strawman the argument or attack the proponents, steelman the argument and actually try to take it seriously, while looking for contradictions that imply falsehood
@cp37373 4 місяці тому
Lol false
@jeffk3746 4 місяці тому
@@cp37373 great argument bud
@michaelhobbs8082 4 місяці тому
How deeply, deeply I wish this is how humanity worked. The political environment in my country is so entirely incompatible with your notion that I think, if we ever achieved the level of rhetoric you imply, it will have completely vanished within our lifetime. The Information Age is giving way to “might makes right” and hypothesis driven science has lost relevance in the public discourse. The adage that “science doesn’t care what you believe” is no longer about truth - but rather a reason to ignore it.
@oasntet 4 місяці тому
It's a useful analysis for other reasons, but it's not a great way to do debunking. The main issue is the imbalance of effort; it takes almost no effort to start a new conspiracy theory, but huge amounts of effort to treat it seriously and do the debunking. And then once you're done debunking, you get lumped in with "them" and are in on the conspiracy.
@garethdean6382 4 місяці тому
The problem is that a solid conspiracy involves the deliberate destruction or hiding of evidence. Any absence of evidence is merely evidence of a successful conspiracy. Only the believers can be trusted and they always find LOTS of stuff.
@Devlinator61116 4 місяці тому
I find it funny how the Silurian hypothesis was named after the pre-human race called the Silurians in Doctor Who, which were named after the Silurian period, which ranged from 443.8 to 419.2 million years ago, a time when such a civilization may have hypothetically existed. It's all very recursive, like Pokemon Yellow being based on the Pokemon anime which was based on Pokemon Red and Green.
@dinoflame9696 4 місяці тому
And the Silurian is named after an extinct civilization
@Crushnaut 4 місяці тому
If the Silurian's did exist, they existed before all the worlds major coal beds were laid down, 350-300 MYA.
@thomasrinschler6783 4 місяці тому
While they are named that by a scientist in their first story (and the name sticks), in a later story (concerning their aquatic cousins the Sea Devils), the Doctor says that the time period is incorrect and they should be called "Eocenes"
@kothar6159 4 місяці тому
Funny enough I just got yellow.
@frankn254 4 місяці тому
Red...and Blue.
@glock112983 4 місяці тому
This was awesome. This answered a lot of serious questions I had about this idea.
@s4098429 3 місяці тому
The same thought processes and experiments could be used to help find evidence of very brief biogenesis on Mars or Venus. Figuring out the origins of trace amounts of unusual stuff is worthwhile.
@mayoite160 4 місяці тому
this is the best explanation of the silurian hypothesis i've seen so far, not to mention the most comprehensive exploration of its implications, something sorely lacking from the other videos
@theark1400 4 місяці тому
@@iridium8341doesn’t elaborate 💀
@Ezekiel903 4 місяці тому
agree, but we are missing 100 million years in geological layer, and he assumes that an earlier civilization used the same technology as us, atomic energy, earth fertilizer, oil based industry et cetera, which is a big mistake.
@paulonius42 3 місяці тому
@@Ezekiel903we have to look for that with which we are already familiar. He doesn't assume anything. He explains how our kinds of technology and energy would leave markers for future generations, because we are the only example of technology and energy use to go by. What exactly do you suggest we should be looking for? Please tell me how to look for an unknown technology we have never conceived.
@Ezekiel903 3 місяці тому
@@paulonius42 massiv build buildings, like the new one found in Siberia, over 8000 years old!
@paulonius42 3 місяці тому
@Ezekiel903 There was no massive building found in Siberia. The 8000-year-old fortress there was a very modest construction. We have other much larger fortresses dating back 5000 years. An 8000-year-old fortress is evidence of our civilization's ancestors 8000 years ago, not even remotely something connected to a previous civilization millions of years ago. Also, the video explained why buildings will be far less likely to last as long as the kinds of evidence he cites in the video. Perhaps you should watch the entire video before commenting next time.
@chaunceyfeatherstone6209 4 місяці тому
Stephen Baxter's book 'Evolution' has a chapter exploring this hypothesis. It dispenses with the "advanced" civilization part, which, to me anyway, presents the much more intriguing notion of simply intelligent civilizations before us. If the pyramids aren't going to be here 200 million years from now, what hope would there be for a fire-sharpened stick from 200 million years past?
@nahCmeR 4 місяці тому
Well the pyramids would last exceptionally longer then a fire sharpened stick so I'd say about 0. Really not the best example to use when comparing to the pyramids, I get what you're going for.. but that just ain't it chief
@razzleyaheard3204 4 місяці тому
We have no reason to believe it without evidence in its favor which there is none.
@Tamamo-no-Bae 4 місяці тому
@@razzleyaheard3204 And that is the problem. How would we get evidence of such when 99.9% of all life is erased? The fossils we have are from EXCEPTIONAL cases. If we time travelled back to the cretaceous forexample, we'd see countless species not in the fossil record at all.
@Alex-ff1mk 4 місяці тому
@@nahCmeRyou most definelty didnt get what he was saying if you think that wasnt a good comparison
@nahCmeR 4 місяці тому
@@Alex-ff1mk sarcasm must not be something you're familiar with is it? You don't have to answer you've already made that clear.
@MSIContent 4 місяці тому
Excellent and thought provoking. Nice work.
@JoePatterson 4 місяці тому
Imagine how interesting it would be to find the remnants of a billion year old lunar lander.
@casinodelonge 4 місяці тому
Yes, space artefacts are something he didnt touch on.
@tukkajumala 4 місяці тому
The Moon is hit by around a hundred detectable asteroids every day. Within a billion years the Moon is hit by tens of trillions of asteroids, traveling tens of thousands of km/h. A single nearby impact would annihilate the rover, sending it into space in tiny specks.
@KevinWarburton-tv2iy 2 місяці тому
Yes, but maybe, just maybe there some ancient underground bases/mines, artefacts, ruins on Mars & the Moon. We might find our evidence for other life from elsewhere or elsewhen out there rather than here on Earth.
@cherokeegabel2397 4 місяці тому
I think it would be safe to say that if a second "advanced civilization" did emerge, they would immediately know about our existence as soon as they went to the moon... Of course this considers our future proposals of lunar construction and expectancy of human existence...
@RicardoSavino 4 місяці тому
Yes, but what are the odds of they finding something so small on a huge place like the moon? Maybe after we get to the poles, but if we kill ourselves before that, it would be another story.
@Dennodq 4 місяці тому
They would probably think it was aliens.
@jpuroila 4 місяці тому
Depends on how soon they emerged. Also, human remains on moon are (at least currently) limited and easy to miss.
@obscurity3027 4 місяці тому
The surface of the moon is pretty damn big. It’s not a certainty that a future civilization would explore the same small area as the one on which we landed.
@apokatastasian2831 4 місяці тому
also a few meteor strikes in the right places would scatter our footprints and bury our landers and that'd be that
@duskfallmusic 3 місяці тому
Ive' been extremey dissociated all night struggling to watch anything -- but apart from playing a game or two, i managed to watch this whole thing, it was JUST calming enough and not super hyped up that I could pay attention - It was really cool, and i'm really grateful that when my brain wants to fold in on itself i got a home on youtube i can poke into for info content :)
@QoraxAudio 2 місяці тому
What do you mean?
@marcelbruin9151 Місяць тому
@@QoraxAudiohe was bored
@noanyobiseniss7462 2 місяці тому
Any civilization that follows us will find our footprint on the moon if nothing else.
@norneva775 3 дні тому
Nah they’re will still be some McDonald’s burgers in perfect condition 2,000 years from now
@barkasz6066 4 місяці тому
Nothing like a bit of existential dread in the morning. This puts the 9 to 5 daily grind in perspective.
@VRnamek 4 місяці тому
if there was such civilisation, maybe our best bet would be to look for artifacts they may have left in pretty stationary environments, like in moons without much geological activity or Lagrange points... they may just be out there, waiting to be found. And indeed as we search for them we ourselves may leave a trail for the next arising curious civilization...
@georgelionon9050 4 місяці тому
Lagrange points are not that stable, they are mostly "saddle" gravity wells or "orbits".. on the long run stuff will fly out (otherwise every body would have moons in the L points)
@josephdocis1488 4 місяці тому
@@georgelionon9050 L4 and L5 are stable, which is why there are groups of asteroids at Jupiter's L4 and L5 with the Sun, called trojans.
@Somerandom1922 4 місяці тому
@@josephdocis1488however, those orbits aren't that useful outside of their stability. One place to look would be geostationary orbit. It's far enough from earth that orbits can last hilariously long before decaying, and unlike some geosynchronous orbits, there isn't an annoying interaction with the moon that causes it to rapidly decay. However, these would still be small satellites 35,000km away that, if they're millions of years old, may very well have been destroyed by a interplanetary pebble.
@mattmaas5790 4 місяці тому
Well the senate passed a bill that literally talked about declassifying non-human intelligences artifacts and then Republicans just totally gutted it. It's big news in the ufo community and does have lots of specific examples of things to declassify...
@monad_tcp 4 місяці тому
just find the Tacitus
@schfiftyfive9680 4 місяці тому
"LIZZID PEEPOL" -Hecklefish
@cultiv8599 2 місяці тому
R u done? -hooman
@clays1507 4 дні тому
Exactly
@pastorpresent1 3 місяці тому
I think the one who should take a bow here is the one who wrote the script for this video. Very well done! I was somewhat convinced that there had been previous ancient civilizations. But you dealt with all the issues I could think of in a way that was compelling.
@earthknight60 4 місяці тому
For anyone interested in this sort of question the 2008 book *The Earth After Us: What Legacy Will Humans Leave in the Rocks?* by Jan Zalasiewicz is an excellent read. It looks at what the remains of our own civilization will look like over time up to around 100 million years in the future.
@Dr.Kay_R День тому
Thanks. I was interested 😅
@HassanGaba1 4 місяці тому
Excellent. This was a really thought provoking video and I must commend the team behind spacetime for not considering this topic off limits, because I trust that with Matt behind the show even a speculative topic like the silurian hypothesis will get the spacetime treatment that it deserves.
@RobleViejo 4 місяці тому
Hijacking the Top Comment to ask a simple question : Why is there so much Xenon 129 in Mars?
@mattp3518 4 місяці тому
@@RobleViejothat's a very good question that nobody seems to have an answer for
@petergaskin1811 4 місяці тому
Not strictly a hypothesis, I think that this should be filed under "Brainfarts".
@goobyboxxton8526 4 місяці тому
@@RobleViejo Saw this comment and felt the urge to contribute. This video was interesting and a partial explanation of this is addressed at 15:14 when nearby supernovae are mentioned as a possible source of fissile material. Interestingly the half-life of some of these materials and the distances involved would make it impossible to travel such distances and be deposited on planets in our solar system. A controversial alternative hypothesis is solar micronova events. Such events could have also restarted biological development on our own planet. So was it an advanced civilization that wiped itself out from nuclear war, or was it a solar micronova event that sterilized life in our solar system? Or even more far out, was a solar micronova event triggered by an advanced technology as a doomsday weapon or technical failure? The possibilities are only limited by our imagination. Happy hunting all!
@danm3570 4 місяці тому
fun to think about, thanks for going to effort to analyze all this properly 👍
@robbob3052 16 днів тому
Stumbled onto this channel like 2 weeks ago. Very happy I did.
@brutussmithicus 4 місяці тому
I have a Douglas Adams inspired variation on the Silurian Hypothesis. The Dolphins land dwelling ancestors once built a great civilisation, mastering the wheel, cities, post office towers, wars, etc. But the more they developed this magnificent civilisation, the more they realised that they could only de-stress from their high flying careers by mucking about in the water having a good time. Then came the most important moment in their social evolution - they realised that all of these achievements were a pointless distraction from what they actually enjoyed! So they genetically engineered themselves to become fully aquatic, dismantled & cleaned up all of their cities (to avoid giving any future advanced species bad ideas) and retired to the sea, where they have been mucking about and having a good time ever since. The only thing which depresses them is watching humans make the same mistakes, which is why they try to make friends with us & encourage us enjoy mucking about in the sea whenever possible. Whilst completely unsupported by evidence, this hypothesis is now ready for peer review :D 😍
@gaeroot 4 місяці тому
They must not have invented WiFi. No way anyone is giving that up.
@brutussmithicus 4 місяці тому
@@gaeroot Hmmmm, debatable. When I think about the amount of stress I suffer from low battery alerts & listening to ignorant morons spout pseudoscientific BS with supreme confidence, I often want to throw myself into the sea 😕
@kennethmartin1300 4 місяці тому
@@brutussmithicusBut, present company excepted, of course!🤔
@jamesc8843 4 місяці тому
What’s that cartoon that makes the dolphins god like lol
@brutussmithicus 4 місяці тому
@@jamesc8843 Dunno, but worshiping dolphins sounds like a much better idea than worshiping any of the 10000 deranged gods that humanity has invented so far. There is good evidence that dolphins actually exist 😀🐬
@r1nger81 4 місяці тому
Matt is a fantastic narrator. He's certainly qualified for physics related stuff, but he would make a great documentary narrator on any topic.
@GenericInternetter 4 місяці тому
Simon Whistler
@r1nger81 4 місяці тому
@GenericInternetter Yeah. I dig fact boy too. Great presenter...no shortage of UKposts channels 😁
@ArawnOfAnnwn 4 місяці тому
@@GenericInternetter He has enough channels. Don't spread him even wider!
@falconeagle3655 4 місяці тому
he IS a physicist
@Jezee213 4 місяці тому
he really is great.
@librapondo_ 2 місяці тому
Question to the maker of this video: I really enjoyed it, if an advanced civilisation launched a satellite, would it have survived to present times in the atmosphere of space?
@vycos-zen 3 місяці тому
thank you for the most succinct and informative explanation on this subject, i ever heard. i do see it different, learning about the effects of deterioration, and the eve changing nature of the earths crust. i think we should just get our own stuff together, and not worry too much about the past. :)
@IsaacKuo 4 місяці тому
I love the Doctor Who origin of "the Silurian hypothesis" name, because it's an example of Doctor Who actually being scientifically valid. The "Silurians" aren't called "Silurians" by the humans because that's the age they're actually from. Instead, humans call them "Silurians" because that's the geological layer where they found their underground hibernation base. It makes sense that this is a lot deeper than the geological era they're actually from, because they were creating an underground hibernation base from the start.
@icedbear 4 місяці тому
Have you heard of Crawford Lake? Currently the best location that records our impact. Also called the Anthropocene lake.
@russellzauner 4 місяці тому
Don't make me go up there with an immersion blender and mix the layers!
@TJ52359 4 місяці тому
I think I just saw a Video from Eons a week or so back...
@dewaard3301 4 місяці тому
Did they not recently do a video on this exact lake?
@udishomer5852 4 місяці тому
Great video! Keep up the good work
@Dufoth 3 місяці тому
"Theres no evidence for it" thats the point, they could have been here and we would never know. Not saying there was, just that there could have been and we wouldn't know.
@gaelgarcia-velez3103 10 днів тому
Well then the only question is Who cares?
@nuttysquirrel8816 7 днів тому
Here's the real kicker, what if it was us and we just don't remember? 🫤
@Ganjor420 4 місяці тому
I just realized, the sadest solution for the Drake Equation would be, if it turns out the limiting factor why we don't see life everywhere is the duration a civilization survives, and not how hard it is to get there in the first place.
@oasntet 4 місяці тому
The Great Filter is no joke.
@8584zender 4 місяці тому
Sagan pointed this out in the original Cosmos. He ran the (at the time) best guesstimates for the variables in the Drake equation. It all came down to the life expectancy of a technological civilization. If that number was 100 years (from invention of radio to extinction) then the number of radio communicating civilizations in the Milky Way is 1. Just us.
@icekingsbattlefield9805 11 днів тому
The dark forest theory could be the answer
@coolsa 4 місяці тому
I've done some thinking about this, when looking back at some historical mass extinction events. The Permian-Triassic extinction event roughly 250 MYA was one that really stood out to me, even though it everything I'll mention can be solidly explained by the aforementioned catastrophic volcanic-fuel interactions. The P-T was one of the few known mass extinctions of insects, which we are also doing. It has some evidence of ozone layer depletion, which we narrowly avoided with CFC's. It has evidence of a large dying of marine life including coral, which is an issue that our actions with ocean-acidification is amplifying. Not sure how volcanism could cause the insect extinctions, but there are some hypothesis that the burning of coal and high-temperature interactions could have created some highly-reactive ozone-consuming chemicals. Volcanism could have also generally increased the CO2 in the atmosphere, leading to increased acidity of the oceans, and then wrecking coral life. Also, a little strange how during this time the Lystrosaurus made up such a large portion of living creatures and left behind so many fossils. Haven't really gone further, but its a very interesting thought experiment! Something for a team up of interdisciplinary researchers to look at... Edit: Forgot to mention the C12 and C13 ratio! Those changed radically due to the mass-burning of organics, which could have been caused by the Siberian Traps volcanism, or by some species of coal-burning creatures.
@whifflingtove 4 місяці тому
Are you suggesting Lystrosaurus could've been domesticated? Why would it be strange for it to be just a very successful grazer?
@bpz8175 4 місяці тому
The mass extinction of insects in the P-T event isn't sudden though (unlike today). Given that the P-T is also the largest mass extinction event on record, it would be expected that insects be affected more strongly just like other life. On the other hand, we are arguably causing insects to go extinct before any other group of animals due to our land and pesticide use.
@coolsa 4 місяці тому
@@whifflingtove They could have been the most successful grazer of all time, and somehow avoided predation (until their extinction), or just happened to live in a way that favoured fossilization (like living by flood plains). Some food for thought though, humanity and our domesticated animals make up around 95% of current land-mammals lifeforms, while Lystrosaurus makes up 90% of the fossils found from the PT boundary. Thinking about it like a science-fiction enthusiast, perhaps they were a domestic species of a specific obligate carnivorous species. Perhaps they were themselves the tool-users, and progressed much much slower than we did in technology, getting "stuck" in some places, and not innovating themselves out of some Great Filters. Who knows what other sapient species would do or how they would behave, that's for scifi authors to speculate, with emphasis on the fiction.
@coolsa 4 місяці тому
@@bpz8175 I mean, there is a 15 million year gap in insect fossil record between the late Permian and early Triassic, with a major shift in dominant species occurring somewhere in this time, so its hard to pin down how long the insect extinction took. Though, the source for that is a paper is dated to 1993, and I really hope that further research and discoveries have happened in the time since, since my main source is Wikipedia citations. A quick google search shows a 2022 paper published in Frontiers claimed that 1/3 of insects went extinct at the PT boundary, which pretty similar to the 10%-40% of insects currently endangered in our Anthropocene era. This paper also specifies these extinctions occurred after a long decline from the middle-Permian onward, so its super unlikely that this was actually caused by any sapient species, but its still fun to speculate!
@ericsaul9306 4 місяці тому
@@coolsamore food for the thought! Humans and our pets and livestock will be fossilized by the billions so we will appear quite ubiquitous on the fossil record, the reason for this it's that one of the requisites for fossilization that makes it such a rare occurrence is that the body needs to be buried soon after death, preferably before decaying and before predation in an environment conducive to fossilization and protected from crushing or again predation, this is basically what we have done for thousands of years through burials, it could be the case that Lystrosaurus is so ubiquitous because it was ritually buried too.... Then again probably not.
@zbighugh9193 4 місяці тому
Ozymandias BY PERCY BYSSHE SHELLEY I met a traveller from an antique land, Who said--"Two vast and trunkless legs of stone Stand in the desert....Near them, on the sand, Half sunk a shattered visage lies, whose frown, And wrinkled lip, and sneer of cold command, Tell that its sculptor well those passions read Which yet survive, stamped on these lifeless things, The hand that mocked them, and the heart that fed; And on the pedestal, these words appear: My name is Ozymandias, King of Kings; Look on my Works, ye Mighty, and despair! Nothing beside remains. Round the decay Of that colossal Wreck, boundless and bare The lone and level sands stretch far away."
@keithtinkler4073 2 місяці тому
Thank you that - very appropriate.
@zacharywong483 4 місяці тому
Superb video, as always!
@salmonesque 18 годин тому
Incredible writing and great presentation. I love this channel.
@Welverin 4 місяці тому
It never ceases to amaze me that the Drake Equation, an equation made up entirely of variables, gets any play. It’s just making up the probability of other life in the universe with extra steps, while giving it an air of respectability so people are fooled into thinking you’re not just making it all up.
@chrisdonovan8795 4 місяці тому
I thought Drake was just a singer. Huh. The more you know. 😂
@garethdean6382 4 місяці тому
It's organized ignorance,and it's very useful when you make up 'reasonable' numbers to argue your case. It gets play because it's a useful tool, if only for the person arguing.
@fbsfgr 2 місяці тому
Make a better guess.
@KevinWarburton-tv2iy 2 місяці тому
The point is that the variables are markers, placeholders ...a framework superstructure in which we strive to fill the gaps with facts within each Variable Box. It gives us an Endo-Skeleton on which to adhere "the Flesh of Knowledge" as we learn more.
@Welverin 2 місяці тому
@@KevinWarburton-tv2iy Nice try, but that's nothing but a bunch of flowery language trying to obfuscate reality: no one actually treats it that way much less makes it clear that's all it is.
@user-ro5tn3zt1d 4 місяці тому
Another amazing video that really makes me think about, well, everything 😆 i'm a 13 y old girl and literally one of my most favourite things is coming home from school and curling up in bed with my cat and watching this channel for literally hours on end till my parents get home from work lol. I've been watching you for a few months now and I'm not lying when I say I've learnt more from this channel than I have in my physics class 😂
@Ggdivhjkjl 4 місяці тому
Have you thought about uploading a video of your cat? 🐱
@user-ro5tn3zt1d 4 місяці тому
@@Ggdivhjkjl I have but my dad said I'm too young to be uploading stuff. Maybe when I'm older I will. For now I'm using the internet to learn as much as I can BC I think I want to study astrophysics when I'm in college 😀
@Justmint939 4 місяці тому
@@user-ro5tn3zt1dyour dad's totally right. Too many creeps out there. Good luck with astrophysics!
@Dover939 3 місяці тому
@@user-ro5tn3zt1d You should listen to your dad. Tons of weirdos especially on youtube. I hope you do well in college, I'm in college now myself
@ditalotl 17 днів тому
Hi, I am glad you have an interest in these topics and wish you all the best and a lot of luck in your future goals!!! :) But, please be careful of weirdos on the internet! You already posted way to much info, such as your age /gender, as well as the fact that you're alone at home after school (telling you have a cat, can also give someone an impression about your personality, but also narrow you down from a group of people). I am sorry to say this, but sadly, all these info are just gold for creeps lurking around, (online, but also offline...meaning in the real world!). Don't want to scare you either, but I would really advise you to delete this comment :/ You can write another one, if you like, but please keep the info you give about yourself (anywhere on the internet...but also sometimes in real life) to a minimum! Again, wish you the best in the future, and above all...stay safe :) p.s. DON'T EVER send or upload anything online, without your parents consent (and also, only if you feel okay with that!), no matter WHO asks you, okay! Please!!! Even if the requests may sound like they're harmless, like the one from one of the dudes here asking you for cat videos, or whatever! Sorry again if I am scarring you, but better a bit scarred now than very sorry later! Bye 🖐
@astyanax905 Місяць тому
It's not quite as insane as I once would have thought. video is bang on correct.
@MitzyB1 4 місяці тому
Brilliant and thought provoking as always. Thank you Matt 🙏🌟
@billg.7909 4 місяці тому
I would never watch a video with this title, except when produced by PBS Space Time. Great work again Matt and all.
@timurphy8888 4 місяці тому
I’m certainly intrigued by the concept of an ancient industrial civilization, I think it’s much more likely (and thus more intriguing) to think of an ancient civilization that wasn’t advanced technologically. Did creatures exist that drew on caves walls that have long ago crept below earth’s surface? Can we ever know?
@TheGyuuula 2 місяці тому
The genes and proteins allowing highly intelligent species to emerge just evolved rescently. Even chimps must acquire a few extra mutations to be able to get the level of humans. Anything living before and during the mesozoic could hardly beat a chicken in intelligence.
@MossyMozart 2 місяці тому
@timurphy8888 - Sounds like that so-called "hollow earth" fantasy.
@TheGyuuula 2 місяці тому
I'm pretty sure I had a commented on this, but it's not visible for some reason.
@AiNaKa Місяць тому
@@MossyMozart i think they meant the caves crept below the earth's surface as in subduction
@danielash1704 23 дні тому
Amazing thing about the material of everything when you consider that vibrations are exactly the same thing
@dcptiv 2 місяці тому
tectonic plate movement devours everything on the surface over time.
@ctuna2011 4 місяці тому
"Distant Origin" is the 65th episode of Star Trek: Voyager, the 23rd episode of the third season. Voyager encounters an alien race, but runs afoul of their principles. The Voth are humanoid lizards, and the plot revolves around one particular scientist who has taken an interest in studying Voth origins. They were from Earth and it was hearasey for them to acknowledge the Intelligent monkeys from the same place. Also touched on in Dr Who.
@jajssblue 4 місяці тому
This is why it is important that we scatter as much long lived synthetic radionuclides across the world. Got to leave our mark! /s
@georgelionon9050 4 місяці тому
If we wanted to tell future civ to go ### themselves, how would we do that? And they need to understand it too.
@xaviertorrence2559 4 місяці тому
New golden record but the human figures are flipping the bird
@quentinbricard 3 місяці тому
Thank you for this video!
@stephendavidanderson5746 8 годин тому
Our most distinctive impact to the geologic records would be micro-plastics.
@_MAXrevs_ 4 місяці тому
That ..."Spacetime" finishing sequence at the end of video has always enthralled me❤
@jimmyzhao2673 4 місяці тому
Try ending all your conversations like that for fun. 😀
@NexuJin 4 місяці тому
@@jimmyzhao2673 won't have many conversations after doing that too many times 😅
@dx5soundlabs939 4 місяці тому
Easily the last topic Iever expected to find on this channel
@googlesucks6029 4 місяці тому
Yeah I almost hit the do not recommend channel option on the video listing until I saw it was PBS.
@jozjonlin3170 4 місяці тому
Glad you mentioned the PETM. That era is frighteningly similar to what we see right now. I doubt we'll ever have the evidence to say for sure, but it's entirely possible an advanced civilization lived during the PETM. Possible? Yes. Likely? No.
@rwschumm Місяць тому
Yes, this is becoming a fairly common thought. Many even think that prior earth residents are actually living underground, or under the ocean somewhere.
@PhilW222 4 місяці тому
Many years ago I remember hearing about a dinosaur species (sorry I can’t remember which) that had developed a bigger brain in the later Cretaceous, and the commentator said that had it continued to evolve, it might have been almost as intelligent as humans, and my immediate thought was that it had millions of years head start on the mammals so it would have been MORE intelligent than us. This is a nice overview of what markers might be left, an exciting albeit unproven hypothesis.
@Shard18 4 місяці тому
Mammals actually slightly predate Dinosaurs. Also imagen in the future a new race finds like Babboons or something and r like" if they only had a few million more years they could have been people to." Compleatly unaware we existed. With a hand full of remains artifacts that there academics dismiss as hoxes like we do with stuff like the Critacius hammer
@jamisojo 4 місяці тому
Sounds like a fictional story to get views rather than anything factual.
@MJG206 3 місяці тому
Hadrosaur.
@Krezmick 3 місяці тому
Think how smart some modern bird brains are. I would guess one of the bipedal dinos is a good start.
@KevinWarburton-tv2iy 2 місяці тому
Troodons?
@nigh7swimming 4 місяці тому
What if Snowball Earth was simply a nice ski resort for aliens but went out of fashion?
@Lomogrammaton 4 місяці тому
It’s more like a zoo for aliens. So when they come they are just doing a typical trip to the zoo.
@robaustin_ 3 місяці тому
Thanks for taking this seriously
@LuisVillanuevaCubero Місяць тому
Wow, such an interesting video. Thanks!
@anthonymudge9768 4 місяці тому
I like how this possibility was explored in both Doctor Who and Star Trek Voyager
@piotrd.4850 4 місяці тому
"Distant Origin" - yeah - beautifully started episode, somewhat simply ended. And Voth, being so powerful - strange they haven't move to earth to e.g. erase proof of distant origin. But beaming Voyager with shields raised inside was really something else even on ST scale.
@capt.picard445 4 місяці тому
As someone who grew up watching a lot of fascinating documentaries on Discovery channel only to see it go down to become the conspiracy theory sh*thole it is now, I started watching this video thinking ‘No PBS SpaceTime, please don’t’, and ended it thinking ‘Thanks mate, thanks for a detailed explanation’. Thanks for taking on a risky topic and explaining it without bias.
@mkhanman12345 4 місяці тому
Can you discuss what the vid was about
@MrNuki42 4 місяці тому
Just a little reminder: The whole human experience is biased, because we can only perceive the universe from our perspective. We might be "3D Creaters" living in an 11-Dimensional Universe. The key is to question everything and stay true to the scientific principles which lead to a profound understanding of some laws of the universe so far.
@sidereus8654 4 місяці тому
They still have to work that algorithm. Even the thumbnails aren't really representative of the quality of content that is contained within the videos, but that is what people click on so that's what they have to do. The titles are the same way - wording it like they do engages a much wider audience that otherwise might not end up seeing this channel. The people who already come just for the channel are going to see it anyways, a clickbait-y title and thumbnail aren't going to affect that but will draw in thousands or millions of other viewers.
@oskarskalski2982 4 місяці тому
PBS space time have long ago surpassed any documentaries on either discovery or NG. Neither of them can equate with pbsst in quality of the physics related material.
@ProYada 4 місяці тому
@@MrNuki42 Theories are fine. Theories without evidence disguised as fact are not.
@HamSammichApex 3 місяці тому
Your green screen work is top tier
@user-rm2qj2jh4l 4 місяці тому
This is so cool! I love that PBS Spacetime is exploring incredibly unlikely hypothesis like this, and what their implications could be, without sensationalizing them at all, and being real about the actual likelihood of them happening. Because when something like this is analyzed from such a good scientific perspective, there really are interesting things to be learned from it! :D Thanks for these great videos!
@metal87power 4 місяці тому
why unlikely?
@theskorpian 4 місяці тому
@@metal87powerprobably the fact that there's literally zero evidence to suggest, much less support, the hypothesis.
@user-hh9kz8ng4d 3 місяці тому
Unlikely is what the government would say if they found technology better than ours in an archaeological dig, they don’t want us to know the truth
@fuckingblackgod 3 місяці тому
@@theskorpian Absence of evidence is not evidence of abscence.
@Dover939 3 місяці тому
@@fuckingblackgod Which makes it extremely unlikely as the person you quoted said.
@shadowmil 4 місяці тому
I think this type of question and this type of thinking is very important, regardless if we find ancient civilizations or not. This search answers important questions about how we're affecting the environment we live in today.
@tiffanymarie9750 4 місяці тому
@irdium8341 I hear there are a few nukes lying around that would make a big splash
@wally7856 4 місяці тому
We are not affecting it in any way given enough time. 2 billion years from now tectonic plate movements will erase any evidence of our existence.
@imveryangryitsnotbutter 4 місяці тому
@@tiffanymarie9750 Nukes: the "forbidden technology of the Ancients" of the future!
@computer-training-for-seniors 4 місяці тому
This is fascinating. I would like to meet this presenter to learn more.
@Paul.atherton 2 дні тому
Imagine the stuff that is just under water... off the land bridges that are very recently under water. Imagine what civilizations have been lost to time itself
@mikebmcl 4 місяці тому
Sort of related, I occasionally wonder whether or not we would actually pick up any of our signals, TV, radio, etc., if we had our SETI setup and other tools in a nearby star system.
@kirkhamandy 4 місяці тому
Wonder no more, you can Google this answer. Just search for "SETI link budget". A "link budget" is the term used by communications engineers to figure out the power their transmitters need to be received by a receiver of a certain sensitivity (with potential noise sources thrown in on the link path). You find a few sites with calculators that explain this in more detail and allow you to find various distances based on signal source and strength. I warn you though, when you understand the link budget it starts to get depressing, and you'll wonder why we're even bothering with a SETI project.
@Ser_Loyne_duBeoufe 4 місяці тому
Excellent question.
@imagseer 4 місяці тому
@@Ser_Loyne_duBeoufe Yes, and even the possibility that any alien replies might be replies to 'Silurian' messages that they intercepted.
@mattmaas5790 4 місяці тому
Nope they become fuzzy right away basically
@magma2050 4 місяці тому
SETI automatically discounts any human signals from being evidence of intelligent life 😁
@JMurph2015 4 місяці тому
I think the line of radioisotopes will be pretty unmistakable for a long time into the future. We can't even properly make new steel (easily at least) that doesn't have some miniscule amount of radiation background now. I've read that steel from before the atomic era has become its own market for applications that need very low background radiation levels.
@DalHrusk 4 місяці тому
Do you know how long it takes for those steel contaminating isotopes to decay? Will it be issue after few milions of years?
@TJ52359 4 місяці тому
maybe i'm being difficult... but isn't the Radiation level of Pre-1945 Steel only considered "Low Level" Because Post 1945 is "HighER" and we know what we did in 1945.... If Earth shakes her etch-a-sketch... and the Dog-People rise up in a Billion Years as the 3rd Civilization ; our post WWII numbers will be the only Baseline they know ... and those levels will Either Hinder their ability to do what ever it is that we think we need 'low levels' for; or they will find their own work arounds to it (that we don't consider/solve, because we can still find it however scarce
@JorgetePanete 4 місяці тому
that* its*
@kennethferland5579 4 місяці тому
The problem is that is a test for nuclear technology (specificcally its misuse), not a general test of technological civilization.
@ArmstrongandTumbler Місяць тому
I've been talking this theory for so long now, I'm happy someone is covering it in fine detail. There is such a possible chance humans are not the first Earthlings!
@nikkiparksy 2 місяці тому
Nice it reminds me of the tv program Space above and beyond .
@xitheris1758 4 місяці тому
This, combined with the Martian Canals, is my favorite retro scifi concept.
@billfrehe6620 4 місяці тому
THIS is exactly how you address extraordinary claims like the Silurian Hypothesis. Such claims require incredible standards of evidence. Scientists can take them seriously, there's nothing wrong with that so long as we recognize that the standard of proof is extreme.
@kh9242 4 місяці тому
All that is needed is sufficient evidence it need not be extraordinary
@Titere05 4 місяці тому
It's very complicated to prove, but also to disprove
@billfrehe6620 4 місяці тому
@@kh9242 Wrong. This is why idiot pseudo-scientists get mocked, they make outrageous claims and put up underwhelming evidence to match the claim. The evidence must match the claim. In the present case, there's zero evidence.
@billfrehe6620 4 місяці тому
@@kh9242 Wrong. This is why idiot pseudo-scientists get mocked, they make outrageous claims and put up underwhelming evidence to match the claim. The evidence must match the claim. In the present case, there's zero evidence.
@vibovitold 4 місяці тому
it's essentially a thought experiment which can serve as a starting point for asking actual (interesting and relevant) questions. a thought experiment doesn't have to be plausible in and of itself, in terms of realism of its assumptions.
@charoleawood 2 місяці тому
What a fabulous episode!
@X-jaybyrd 4 місяці тому
this was my first thought when learning about plate tectonics in elementary school, funny how our imaginations can lead us to similar ideas.
@AngeloXification 4 місяці тому
Just when I thought I couldn't love this channel any more
@dxtrum 4 місяці тому
Right
@MalcolmCooks 4 місяці тому
I like the idea of like a bronze-age level dino civilization
@antonialamsyah6859 4 місяці тому
Idea for a movie, i guess.
@Bajso84 4 місяці тому
What about a yuppie-age dino civilization?
@mcstabba 4 місяці тому
In Distant Origin (a Star Trek Voyager episode) dinosaurs went to the stars.
@chrisn8349 4 місяці тому
The Dinotopia books were great.
@alang4190 4 місяці тому
skate boarding dino’s just shredding it
@The-Fool1212 18 днів тому
Could you imagine a somewhat nearby habitable planet just suddenly developing intelligent life millions of years from now and humans simply witness.
@justin.channels 4 місяці тому
Thank you for the proper take on the topic. Would you also address the existence of uranium isotopes that exist only as a function of nuclear reaction--that some slow, natural reaction can take place on the absence of intelligence? Cheers.
@Nethershaw 4 місяці тому
I really, really like it when we do this. This thing is very, very, very, very, very probably not true -- but we stand to learn an awful lot if we explore the possibility anyway.
@Jason75913 4 місяці тому
The better way to put it (and the point of this vid): we stand to learn a lot of we explore _how_ to explore the possibility.
@----.__ 4 місяці тому
It's like those matrix logic puzzles, you know the ones, for example there's 5 people who live in 5 coloured houses and have 5 different jobs and keep 5 different pets etc etc. The clues those puzzles give aren't so much the information that's in black and white, you have to infer what can and can't be true and by eliminating what can't be true you find the truths that aren't even written. [edit: they're called "logic grid puzzles". Never bothered to find out the name until today! If you haven't tried them before then give them a go, they're a lot of fun and good exercise for the mind]
@dockholiday0731 4 місяці тому
Thank u for this channel as well as Matt.i appreciate how he/you explain it to us or myself.i look forward for all of ur subjects u talk about.again thank u
@J0krswy1d 28 днів тому
For as much as you mentioned the thing, I'm surprised that UKposts didn't slap a context warning on this video.
@michaelyaziji 4 місяці тому
Fun. Thanks. 1. Did we just focus on the last 1/2 billion years? 2. I understand Occam’s razor, impossibilities of proving a negative, etc., yet I’m not sure why we assume it is an extraordinary claim (therefore requiring extraordinary proof). Couldn’t we frame it as a default assumption, since all of our experiences of 500m-year-earth timeframes for which we have data has led to technological civilization? Thoughts welcome?!? 😊
@SometimestheY 4 місяці тому
Many species of dinosaurs were around for a looooong time. They had large, complex brains and are some of the only other bipedal creatures, with grasping hands, we know of to have ever walked this Earth; many of their bird descendants build homes, take care of their young, use tools, and are capable of song and complex speech patterns. It really doesn't seem that far-fetched to me that there might have been some level of at least pre-industrial or early industrial dino civilization. Glad Space Time is finally spreading the word. 😉
@rhino6139 4 місяці тому
Draconian are related to dinos, the way man is to chimpanzees.
@davidmhh9977 3 місяці тому
That's almost existentially horrifying, to think that bird intelligence might be the result of a species with human-like intelligence, decaying for millions of years. I'd be like humans evolving back into ape like primates
@Iv_john_vI 3 місяці тому
Tyrannosaurus Rex having tiny hands definitely suggests they were Jedi.
@justin-tyme 4 місяці тому
There was a great episode of Star Trek Voyager (Distant Origin) that had this premise... "We are not immigrants!" Very cool.
@exscape 4 місяці тому
One of my favorites! And the first thing I thought of when I saw this video title + thumbnail.
@eSKAone- 4 місяці тому
I love this episode 💟🌌☮️
@riccarrasquilla379 2 місяці тому
thanks for the video
@juliane__ 3 місяці тому
3:06 6:28 No, continental crust is not recycled through plate tectonics. Only oceanic crust is. There is scratching at the boundaries and part subduction of islands, but less than new land mass is produced. Sediments are recycled when being trapped in subduction zones, but as a rule of thumb, these are from mountains. Large continental basins are more or less stable. They stay and accumulate over time. Maybe the early very small landmasses were drawn down, but that is speculation. 6:50 No, we disturbed the earth surface by kilometers depth and wide simultaniously. This will stick out in the the stratigraphic record like a lighthouse. With all machinery 100-1.000t in weight still insitu. Future civilisations will certainly find this simply by observing the magnetic distortion or change in electric conductivity. No future tech, we routinely find deposits in this way. 7:35 No, if they have build roads and rail like we do, we would have find them in the stratigraphy for certain. You can look at river deposits from 100s million of years ago and you can clearly see the geometry with little distortion. As i said large continental basins tend to stay. The stratigraphy down 12 kilometers can be relatively undisturbed. Maybe you guys should stick to astronomy. We are so ubiquitous around the globe, we are one of the defining species of our stratigraphy. Our bones, you plastics, our radioactivity spread, our concrete, iron and steel everywhere and in megastructures, our unprecedent change of the atmosphere and maybe also unprecedent reverse of atmosphere composition. Nothing like this had been found but it would be found for certain. Clearly no one involved asked a geologist. This is 1. semester stuff.
@jakobthomsen1595 4 місяці тому
How long (on average) would artifacts survive on the moon? Would the chance of finding something there be larger or smaller than on earth?
@ILLUMINATED-1 4 місяці тому
Radiation from the sun would first bleach then break down many surface artifacts, I believe. Theres also cold-hot cycles and impacts that complicate things.
@DaveCompton5150 4 місяці тому
I've seen estimates that it would take 10s of millions of years for the Apollo landers to be destroyed by micro meteors
@roo1314 4 місяці тому
Well. That was one terrific video. (Partly, I suppose, because I could understand most of it). There was even some swipes of humor in there. Swordbound, below, wrote "I love serious answers to silly questions." But, it turns out it wasn't quite as silly a question as I thought at the beginning of the video. Thanks!
@watts18269 4 місяці тому
I was thinking that as well, this might be their first vid I’ve ever got all the way through and understood all of it 😅
@wtflolomg 4 місяці тому
I always felt like the Drake equation ignores the idea that civilizations will develop in different windows, and secondly, that the time period within such a civilization where they are "noisy" with RF to be detectable would also be even more fractional. A civilization that is more advanced than us might develop tech that can communicate across interstellar distances without "broadcasting" energy (it's noisy - attracting potential threats - and inefficient)
@juiceytee 3 місяці тому
Superbly succinct ❤
@jamesm1494 4 місяці тому
I enjoyed this episode (and I didn't need to Google Silurian 😉). I watch every one but must admit I struggle to follow some of the deeper mysteries of Space-Time. This was about my level.