Aliens: "Greetings! We send this message in an attitude of peacefulness." Us: "Your able to communicate in English?" Aliens: "You're"

Just because we haven't found them, doesn't mean they haven't found us.

The fact that we have looked at what is equivalent to a cup of water from the Pacific sea of space and some people throw up their hands like "well we looked in this cup of water of space and found no intelligent life so intelligent life isn't possible " is one of the most insane proposition in science

Given how long it can take for complex life to form, another possibility is that alien civilisations could be about as old as our own. In this case, we both only started looking out into space very recently. It's like placing 2 people on the opposite side of an empty earth for 2 minutes and asking them why they haven't found each other yet. Edit: I said it's one POSSIBILITY out of millions and billions of other possibilities.

It's wild to think that even if a signal was sent at the speed of light from an advanced civilisation a million light years a way, by the time we receive it, that same civilisation could have been extinct for hundreds of thousands of years.

The way the Dark Forest is presented in Lin Cixiu's books is amazing.

"it could be that we're the only island of meaning in an ocean of 400 billion suns." I love how scientists and science can be so effortlessly poetic and beautiful without trying.

"There are 2 possibilities. Either we are alone in the universe or we are not. And either possibility is equally terrifying." - Arthur C. Clarke

Vast distances, the limited speed of light, extremely specific stable conditions, and our own lack of ability to reach/message even nearby stars, all easily explain the Fermi paradox for me.

The way we search for Aliens, not even knowing they are friendly, is absolutely terrifying..

I think it's pretty damn special to live in a universe on a planet at a time when Brian Cox is alive to share his knowledge and enthusiasm. 🥰

I don't think there's anyway possible that we are alone. The size of the universe is inconceivable, in the amount of planets orbiting suns seems almost endless.

I personally look at it as seperately picking two people anywhere on earth throughout the history of human civilization and expect them to meet eachother - only ridiculously more difficult. What are the odds that they will be born within the right timeframe and distance and with the ability to actually meet? If there is life out there its likely died before us, will live after us or if actually alive now is so far away we will both be gone before we could ever make contact.

Brian is so enthusiastic and over the top happy when it comes to these things

Brian Cox could put you in a youtube coma for hours listening to him he's fantastic at simplifying science for us.

Love Brian Cox ❤ he’s a Rock Star on so many levels ❤

The dark forest theory is funny to me. I can just imagine other civilisations wondering why we want to be found so much and are just shaking their heads at us knowing we’re gonna get extinguished 😂

I could listen to this guy for hours. Love it.

When I was little my dad worked on the Sojourner Mars Lander. He brought home a piece of it... so it away my energy signature already there!!! Blessings!!!

The absolutely mind-blowing concepts presented so succinctly for mere mortals like me by Dr. Brian Cox and Co. are so very much appreciated. Cheers from Melbourne 🇦🇺

Planets evolve so much over millions of years. The distance between us and other planets plus the multitudes of variables evolving those planets make contact and space travel so incredibly difficult.

Intelligent life deciding to not contact us is what makes them Intelligent.

This was fascinating, thank you!

To think how unique we might be in the galaxy and yet how self-destructive we are is extremely depressing.

If we're the only civilization in the universe, that either makes us incredibly important or incredibly insignificant, depending on how you look at it.

I often wonder if the answer is staring us straight in the face in the form Ring Galaxies, like Hoag's Object. We humans have a tendency to put undue confidence into our observational hypotheses. One thing peculiar about Ring Galaxies is the preponderance of Bright Blue Stars . These are the same types of stars that produced the metallic elements we put into our current technology.

After reading The 3 Body Problem I subscribe wholeheartedly to the Dark Forest hypothesis. I do believe that we’ve been “visited” by ET’s but that they hold a similar outlook to us. We should, however, be extremely careful about how we advertise ourselves in the universe

Can't it just be that space is massive and there's aliens as advanced as us or more advanced but they haven't left their galaxy or visited us? Why is that so hard to imagine?

It’s like waking up in your pitch black room one night, waving your arms around, and concluding that based on the fact that you didn’t touch anyone it must mean you’re the only person on earth. Ignoring the fact that a dozen people could be in the room with you but you can’t see them, and the fact that outside your house there’s 8 billion other people going about their lives completely oblivious of your existence as well. Imagine one day we discover a new form of communication, like how we went from talking one day to radio communication the next. And we discover that the universe is FULL of this kind of communication, we just couldn’t hear it before. Civilisations begging for help, fighting… the dying screams as one after the other, *something* suddenly silences them. Then we realise it’s heard us too and is on its way.

I’ve always thought the probability of sentient life developing is roughly equivalent to the size of the universe. Unfortunately we don’t know how life actually occurs and hence can’t work out an accurate probability.

After seeing (and reading) 3 body problem, my feed is full of theese videos,,, and i love it👽

The Dark Forest hypothesis was invented by Liu Cixin one of the best science fiction writers in the history of humanity

Just wow, seriously. Checking out ancient dried up lake beds on Mars, and I didn't know there was *that* much water on Europa. Great stuff! Thank you

Imagine you drop a 10-foot circumference boulder in the Atlantic Ocean from 100 feet up, off the coast of France. Would you expect to be able to detect the waves the boulder makes in New York City? I think that's the problem we're dealing with: There's just a lot of space out there, and the signals we're looking for are small.

Love Brian Cox!! He makes such complex things so simple to understand

Given the vast distances involved and the vast time for signals to travel it, plus all the other noise going on in universe, I suspect any signal will be impossibly weak and practically impossible to detect. In any case, we can never see back beyond a certain point as time always marches forward, and we cannot yet see beyond the cosmic microwave background. It’s like sitting in the middle of ocean, where you can only see a small area of sea around you (that analogy breaks down because that is caused by curvature of planet).

Always reminds me of what Arthur C Clarke said in relation to life beyond Earth. There are 1 of 2 things definately true in the univserse and they are both equally as terrifying. We're either alone in the universe or we are not.

Thanks Brian! 3:49am and you've scared the shit out of me!

Peter F Hamilton uses this hypothesis as the basis of seriously great books while bringing in panspermia. Highly recommended

The terrifying part of about being a rare unique accident that sparked complex life out of 400 billion planets is that... we can't get along.

The dark forest theory is pretty terrifying. Lord knows what matter of scary, incredibly powerful technology another civilization would have. Our imaginations can only wonder... Science fiction has surprisingly utilized the Dark Forest Theory very well. Warhammer 40k, an entire galaxy constantly at war. Cixin Liu, the milky way being flattened by a hyper-weapon.

What was the opening scene from?

3:05 you go back only 15 or 20 years we only knew about our solar system.We believed that it was possible that all the other stars could have a solar system but now we know.Amazing words

Imagine we received a message back saying..' be quiet they'll hear you'

It’s just that the Universe is so large that it’s almost impossible to pick up signals from anywhere else unless they were specifically designed to be so powerful as to be picked up at astronomical or intergalactic distances.

How come the two best speakers of our generation are both scientists? Neil DeGrassi Tyson and Brian Cox speak so well and with so much passion and enthusiasm. I love listening to them talk.

Contact is my favourite sci-fi film. Can’t believe how long ago it came out

always a pleasure see your videos.

I'm an alien, and I approve this message.

Another concept to consider is that other life in the universe may only be at our level of civilisation and aren't capable of travelling far enough from their own solar system yet to come and meet us and if we're able to stick around long enough, our civilisations may get to a point where we can meet.

If you look at our own transmissions from Earth over time, they increased as we discovered and started using radio, but now that we're advancing our technology further were getting quieter right? So the duration of our interstellar broadcasts is what, less than 200 years? (accounting for the future too). Is it not simply possible that technology advances so quickly that they're only visible briefly. They done need to be actively hiding, perhaps they're just super efficient.

Interesting video, thanks for upload 🌠

We may just have to reevaluate what we call "The Goldilocks zone", as there are many more factors than just a planets position in it's solar system to account for. It's a magnificent chaos out there, just on a scale hard to fathom for most.

I recently read the book "Rare Earth: Why Complex Life is Uncommon in the Universe" by Ward and Brownlee. The authors contend that simple, single-cell life, such as bacteria, is likely quit common in the universe, but more complex multi-cellular life may be exceedingly rare and so-called "intelligent life" (whatever that means) would be rarer still. Excellent, thought-provoking book for those interested in the subject. Spoiler alert: Don't hold your breath waiting for that signal from outer space.

The hardest part about looking is that we have no idea what we’re looking for.

I remember reading a comment that describes that the universe is like a boiling pot of water. The bubbles in the boiling pot are civilizations popping in and out of existence and that’s why we can’t find anything. And I agree with that. I think that civilizations just die out before having the means to travel between stars

This is the first video that actually started to convince me why it could be so hard to find advanced alien life. Yeah there are plenty of goldilock planets... But ones you give several billion years, that survived everything the universe through at them, and the Civilization survived long enough to send signals we could reach.... Then we right now can find those signals and understand them. Universe seems old but its only 13.8 billion years old, Earth formed 4.5 billion years ago, single cell organsism appeared 3.5 billion years ago, AND then multicellular animals appearwd 600 Million years ago, then starting with Tesla in 1899 in Colorado Springs upto nowadays we have slowly been really just starting our search finding evidence of alien life. So yeah, we just might be a very early alien life that is looking for others And the amount of other advanced lifeforms could be rare and very spread out. Sucks, but real possibility.

Cox is one of my favourite comedians.

Great 5 minute video!

Brian Cox could make quilting fascinating

I find it a bit silly potential civilizations out there should be competing for resources, when there are so much of everything out there, and so availability will only be limited in your ability to go and harvest them.

Well, the recent Congress (July 2023) on UAP's would suggest different! I hope you all watched

Somewhere out there…species with powers might exist. I know it sounds outlandish, but the possibility is there. Fantasy may not exist here, but it may exist elsewhere knowing that the universe is vast.

What irks me about the dark forest is this: we already sent out a heap of radio signals, heck even intentional information about us and our location along with a friendly greeting. We did this out of naive trust in technical and societal advance and a sense of final frontier star trekish enthusiasm.. Why should we be the only idiots to have done this and everyone else intuitively chose to stay hidden as best as possible?

It's amazing to me how some of these brilliant, genius people can have such a blind spot right in front of their face?

"It could be, we're the only Island of meaning in a Ocean of 400 billion Suns" 😢 B-E-Autiful quote

If someone in the universe were looking for proof of life in our direction would they find it or will they have to wait a fee million years for the evidence we are projecting now to reach them?

The absolutely gorgeous Brian Cox!

Always wondered "what if" the WOW signal was perfect timing with us listening as two ships were talking to each other in passing at that exact time and that exact spot never to be done again.

Dark Forest Theory : exists... Other Scientists : Let's blast signal out to space ☠

There might be another reason we haven’t found any other forms of life out there. It could be that we are the very first.

Finding alien life is like finding life in Stok-on-Trent, we hope it is out there but finding it is a challenge.

Very poetic Professor!

Oh snap. This just reminded me to check in on voyager.

Great video

Just remember that the old fashioned landline telephone was only invented by humans less than 150 years ago, and means of effectively contacting anyone on any other planet has been around for little more than 50 years. That is such an insignificant and almost unmeasurable amount of time in the scope of our galaxy and our universe that it would have to be a miracle if anything noticed such an insignificant bleep on the 'radar' and the way things are developing we might not be around for thousands of years to come either, and maybe other civilizations have/are having the same issues.

The 3 body problem. The best sci fi trilogy since...ever

All this time I thought I was saving space, but really space was saving me.

A major rule in the discovery process is that we find something unexpected. Which is not surprising given just how little we have yet discovered. This of course doesn’t mean that I expect that the unexpected will come in the form of alien life, it means that anything unexpected is just so because it is alien to us. If we look at life from the perspective of biology we may be missing a broader reality of what in fact does constitute life. It may turn out to be that our bodies (by which I herein include our brains/minds) function for our own purposes…our own ends and therefore we do not see that which is beyond our own little world that our body is functioning for. Aliens could be all around us and we don’t see them….this is not so far fetched if you consider how magic tricks fool us. Alternatively you could consider the capacities of different species to have an awareness of things (E.G) a mole’s eyesight, a bats echolocation etc…..it’s extremely stupid to think our own ability to sense the universe is unlimited, despite technological aides. Again, I recall a certain species was believed to be extinct in Australia, until the so called experts asked the local indigenous peoples about these and were led to them in abundance. The bottom line is that humans are very limited in both intelligence and their awareness of the universe when compared with the immensity of what is out there……we will never know everything, this can only ever be arrogance……which is a fear response to that which is greater and more powerful than you.

Just because we haven't found them doesn't mean they aren't there. I cannot believe we are alone.

How come scientists disagree on such huge question, Gary Nolan stated that we get signals constantly almost every month or so?

What if we are alone, but just in this universe. There could be multiple dimensions/versions of the universe with different laws of physics but essentially based on similar time period of evolution. The possibilities of how different they are in regard to all scientific endeavour would be staggering and some 'versions' could be able to travel to different dimensions. Basically the 90s TV series Sliders lol

A century ago we were still vividly debating if the milky way was the entirety of the universe or not. I think we simply lack patience and due to our short life spans we urge for significance and importance and shape our expectancy by that

For all we know they are near the same development as us. Barely poking a toe off the planet, or maybe still working a few centuries back in equivalence. Maybe they've already passed us and hit the terminal point for their species lifespan. Just because they are out there doesn't mean they are even trying to move off planet, maybe they don't wanna. Not all peoples are explorers on this planet either. If they are advanced like we seem to be determined to project and the only ones we have encountered so far are rowdy youngsters with a new driver's license. They could be social outcasts for their tendency toward strange 'experiments'. Maybe they don't want to meet us - we are far from united as a race, we kill each other all the time. The 'take me to your leader' trope doesn't fly when there are so very many without a top council or person to go to. Delightful to think about meeting someone from Out There, but I'm not holding my breath until they arrive.

at the begining which movie is?

01:34 It took humans nearly 4 billion yrs to become who they are, that's the third of the age of the universe... mind blown.

The way I see is: If they are more advanced and capable of making contact, you can compare it with making contact with gorilla's. We mostly let them live and if we want to study them we do it from a safe distance.

I think time and space distances are so great that even if life is not rare, we would be unlikely to find it

Yeah we all know if any species has reached the level of interstellar travel, they had to work together to achieve that. Thus they will be a peaceful species. Treat and bless all intelligent life with respect and gratitude.

What if the explanation is The Simulation Theory. How deep would a simulation go? Would space be simulated too? All of it?

I think Brian Cox is the best person i have seen on science,completely agree with his theories . Great Video

For me it’s not so much as “they’re scared of us” more as it is “we are afraid of what can bring these things about” because to us we don’t know what brings these things about, and to anyone else; other species, it is the same. “What we’re you thinking?”

SETI is searching for radio signals. what if advanced civilizations are using light(advanced laser) or other form(telepathy) to communicate. are we able to decipher them?

people dont want to talk to their next door neighbours, what makes you think aliens want to reach out

The dark forest hypothesis makes perfect sense to me. Look at how many problems we have with each other on our own world.

It seems that chance of perfectly timing the signal correctly directed at Earth that we can receive in tiny time window of +/- hundred of years we (maybe) have proper technology that matches theirs , is so low , it explains big part of "are we alone" question.

I think it’s very likely that we just can’t cover the distance needed to find other life forms unless we learn to create wormholes

I think it's probably just the fact that the universe is still relatively young, and that it's bigger than our ability to rationalize probability

I personally think we may even be an early universe species, as you say it took a third of the life of universe for us to pop up.

One counter to the dark forrest philosophy is that this all makes sense if there is always a first-strike anihilation diffence in tech levels between the two civs. But why didn't every proto-human kill each other until they wiped themselves out? Because those tribes that tried could not completely elimiate the compention and sometimes ended up in stalemate. And also it made sense to team up to take on a third tribe who was also a confederation of tribes themselves. etc. So individual survival evovled into group survival. Yes some galactic civs are at overpowering levels of tech differences. But some are not. At least in theory. SPOILER Yes the Trisolarians playing with 9 dimensions make them seem overpowered. But this is where fiction dominates the Sci-Fi. If playing with higher dimensions is not what our real universe makes possible, then dark forrest becomes a self defeating strategy compared to recruiting allies.