This was an incredible opportunity. I decided to go all in and discuss everything in detail. How do you feel about a Long Form Smarter Every Day video? Thank you again to everyone who support on Patreon at patreon.com/smartereveryday ! You let me make what I want instead of what I think the algorithm wants me to make!

Hey Destin, thank you again for visiting our facility. Sorry I couldn’t be in the water with you, but it was a pleasure meeting you the day before. As always it’s awesome to have someone share the work we do when trying to get us back to the moon! Hope you visit again soon!

Really phenomenal video Destin, now I find myself looking up what they're using for the regolith simulant in the pool because I suspect they want something denser than good old fashioned sand.

Thank you Destin for making this video and bringing back loving memories. I'm now 81 years old but back in the 60's I was working at MSFC in Huntsville doing Zero G simulations in the MSFC simulators. Besides under water, we had a 5 degree of freedom simulator (no up and down) and a 6 degree of simulator. This was a genius of design but a mechanical nightmare. It was located in Bldg 4755 on the top floor. An air bearing surface was prepared on the floor with self leveling epoxy in which two sets of air bearings were on each side of a large square hole cut in the floor. A spreader beam stretched across the opening and was supported by the air bearings. A single metal pole hung in the middle down to near the floor below and was supported by adjustable negator springs that provided constant force with extension (think metal measuring tape that has spring recoil). This allowed for up and down movement. At the bottom of this pole was a seat similar to a large bicycle seat supported inside a gimble mechanism similar to a kids gyro which allowed roll, pitch, and yaw. From the seat support was located an exo-skeleton for arms, legs, and back support. Everything was zeroed out just like you described in the video for underwater using weights and adjustments. Believe me, it was a sight to behold.. One day we had to put on a demonstration for several dignitaries and a couple of reporters. I was the test subject that day wearing an Apollo Moon suit with a simulated moon surface (spray urethane foam) to walk on. The techs had spent most of the morning getting everything perfect. All went well till this lady in the crowd asked me to see how high I could jump. No problem, I put all I had into it and made a fantastic jump, except I got over my center of mass and came down just like the astronauts did on the moon except more on my head. I was not able to get up without help.. The only good thing was that I couldn't hear them laughing. We had the Lunar module assembly, Skylab assembly, and many test programs underwater for testing. One of the most interesting was a study preformed by GE at the MSFC facility called HEMAR (Human Engineering, Maintenance and Repair) underwater. That was a study to determine the limits of working in a spacesuit such as forces one could exert in a tethered and un-tethered state. This program ran for several weeks and involved a range of percentiles. I was a 50 percentile. I believe data from this study is still being used today. During the early work we were forced to use Air Force pressure suits, which when pressurized presented a sitting position with arms positioned to the controls of an aircraft (slightly bent at the elbow. We got the Apollo suits when we started doing Lunar work. They called this suit a constant volume suit and it was pretty much that, unless one of the interior restraint cables broke, in which it would try to rip you arm out at the sholder. I noticed that those subjects in the newer NBS had a platform to lower and raise them into the water. We only had a platform in the early days that allowed your head to remain above the surface. We had to climb out of that using a ladder, with something like 200 lbs of lead weight. Glad to see that improvement.

I wish Destin could go to the ISS. And I know what he would say - he would say “there are people who spend their careers preparing to go to space” and he wouldn’t want to take a spot from them. But Destin - you’re a really, really smart guy, but you’re still enough of an “Everyman” and you’re a great communicator. It would be fascinating to get to see you document the experience.

Destin! I’m the guy looking in your ears! Such a pleasure to meet you and have you come to our amazing facility again!

Thanks for having the courage to buck the short-video trend and publish what felt like a documentary. So exciting you got to do all that cool stuff!

Man, it irritates me so much how UKposts has conditioned UKpostsrs to think that long form videos are a bad thing... I often skip videos from people I really like just because they're too short and I don't feel like they're going to be worth my time.

Fascinating! Thanks to all involved!

Pat wearing the cap backwards underwater is one of the coolest diving outfits I've ever seen.

The safety diver doing the shocked face with her hands when the astronaut fell over felt very sweet and I cant really explain why

Thanks for a very special treat! I really enjoyed this!

Amazing video! Might be the best one I've watched on youtube. Keep on going!

Hey Destin! Absolutely fantastic video. Thanks for the feature during Bresnik’s fall and recovery. I didn’t expect my audible reaction to be picked up - that’s pretty cool! This is one of my favorite UKposts videos ever. Go team!

I'm not even 3 minutes in and I'm already so stoked to be watching. The subject matter is cool as heck but more importantly, it's Destin's genuine excitement and humility that's had me watching for all these years. Easily one of my favorite channels on UKposts.

Wow! I could watch stuff like this all day long. So interesting 😊

Watching the Apollo guys struggling to walk around will never fail to bring a smile to my face. They're like toddlers all over again trying to figure out walking. The little giggles as they fall is absolutely adorable

Been following this channel since I was 13 years old, and now I’m about to graduate from college with my BS in biology. Thank you for everything Destin.

I absolutely love hearing really smart people talk about their jobs. Thank you Destin and everyone involved.

Hi Destin - My father worked at JSC from 1962 - 1996. He eventually being head of a spacesuit reliability division. Your videos have inspired me to go to NASA to learn more about what my father did and make a UKposts channel about it. Thanks.

Pat was my Primary Instructor for my PADI Open and Advanced Open Water certifications. It's absolutely wild seeing him here and getting a better picture of his role in the program at the NBL. Thank you for this! I feel smarter today.

Diving wearing a baseball cap is probably the most American thing I have seen in a while 😂

Hey Destin, this video is incredible. Around 1:12:50 ish, you were talking about reasons for why the ISS is at 1 atm. The ISS is a short reentry away from the surface, so in the case of an emergency, the astronauts being acclimated to earth’s atmospheric pressure makes sense, however, your video helped me realize that this constraint doesn’t need to be held for the moon because of its distance/increased time. Thank you for helping me make that connection!!

This is a very informative and fascinating video. This triggered long ago memories of going on site at JCC with my dad who was a structural engineer who worked there starting in 1964. He was part of the team that designed the original pool on the JSC site that was in a round building that once held a centrifuge for training. He was part of the team designing the crane that lifted items in and out of the pool. So, mentioning the crane triggered a memory. My dad took my siblings and I on site to see this part of his work. I remember the crane was moved around the pool on a track that circled the building. My dad was also part of the designing of a later pool, I am not sure if it was this NBL lab or another on site. I remember he got a call at home during that time that made him very upset because there was a wall section that collapsed during the building of the pool. It turns out the builder of the pool didn't use his team's ground water pressure for that area and changed the design to put more spacing between the supports for the walls causing the collapse. I don't know much more, except dad had to prove how the contractor changing the support spacing is what caused the collapse. He made a scale wooden model that slid to show the differences in what the support was supposed to be and what the contractor made as a visual aid to show this. I just found your videos and I am binge watching the ones related to space.

The way you treat the camera like an actual person in the room and get others (who probably aren’t used to being in front of a camera like this) to be comfortable on tape and be able to be the best version of themselves is just awesome. Notice it all the time but really feel it’s on wonderful display here like it was during the Kodak series. You’re so kind and genuine. Really enjoy your content and what you do. Thank you.

"I know the video is long but it's worth it" Destin, we love long videos

Man, you have worked hard to make this channel what it is, and get the credibility to experience all of these awesome things, and I am so jealous. Thanks for sharing these. I really do feel smarter everyday.

This has to be one of, if not the, coolest video on youtube. This is exactly what I'd love to see more of on here, super interesting deep dives (pun intended) on how we prepare for space. No one else is doing this sort of stuff at this kind of level, and it being so long is just real pleasure. Please feel free to put out long ones like this in the future again, they're a real joy. Bless you and the work you're doing Destin!

Firefighter here. That stable position 1:10:03 is one of our standard positions. I was wondering if at any point a conversation was has about interdisciplinary evaluation. We train for SCBA maneuvering which is very different but has some helpful overlap.

I'll preface this comment by saying it's POSITVE. I've been waiting for the rest of the Coast Guard deep dive series for YEARS now. It's pretty clear why that isn't out yet. Destin just keeps getting to do cool stuff. So much that he can't even get videos out fast enough. So jealous! Can't wait to see what you do next.

49:55 Unintentional but very funny pun, talking about handling pressure at the neutral buoyancy lab. : D

As a guy severely handicapped by a spine affected by several surgeries and in almost permanent pain, I am absolutely looking forward to some positions in reduced or zero gravity, hopefully reducing pain along with a by-that-time Eliminated hangups on the use of painkillers. Since I won't return if I go, I will NOT be concerned too much about losing bone density. The pool of workers will increase dramatically if space agencies look outside the specs of peak health and lifespan.

The 'lunar walk' segment of the video got me thinking that we all went through that training when we're toddlers! We tried to get up from our crawling positions to figure out our CoG to stay upright. Sometimes we fell on our knees and hands, sometimes we tipped over backwards. Our family around us cheered us on just like the divers. Eventually all the data collected became muscle memory for us and we went on to do more impressive things like running, dancing, sports and gymnastics. Thank you immensely for making this video Destin!! Top notch content!

I am old enough to have watched the Mercury launches on black and white TV. I’m an engineer who has studied aviation and space technology for 50 years. But the simple explanation in this video of the mass, weight, and CG problem was an eye opener for me. I always wondered about the awkward motions on the moon. It’s obvious when it’s explained so well. Thanks.

Fantastic stuff Destin. You’re an amazing person and very interesting, well explained content

Loved the long form video. I don't always have the time for this, so I'm glad you use this approach sparingly. I know when you go long, it's because you've got something cool to share. You are so blessed to have these amazing experiences. Thanks for taking us along for the ride.

As an engineering tech for the Navy, I like these longer, behind the scenes videos. It gives some insite not to what we do but why. Thanks Destin.

46:55 - "This is a lot bigger than what Neil and Buzz went to the moon in." Heck, the airlock alone in HLS is probably bigger than the whole Apollo LM pressurized volume.

Fascinating! We need to see more of these types of trainings!!!!!

Hey Destin, this was a GREAT video. At one point I sent an email to the NBL about becoming a safety diver and at the time they told me they were ramping down the Shuttle Program so they weren't sure of their future. Watching videos like this makes me wish I had pursued it more. As a scuba instructor, not teaching presently, you did a pretty good job with Decompression Sickness (the bends) not perfect but good enough so that most will get the gist. It's about going from Higher pressure to Lower pressure too fast and that is when the nitrogen doesn't have time to be expired and instead comes out of solution in the tissues, blood, and joints (where it gets really painful). I wasn't aware that they were diving that percentage of O2, that's wicked cool. I have dove 38% when I was working on an underwater show, 46% is a whole other level as everything needs to be oxygen clean then, really cool!! Again, awesome video, LOVED it, keep up the great work. Thanks

Seeing the starship mock up in the pool just got me so excited and just helped reaffirm how real this is

I'm very happy with the long format. There are some channels i would not watch for that long, but your content and delivery of that content make the time go by too fast. I vote for detailed long format videos. As a long time diver (53 years diving), former instructor and former cave diving instructor it was interesting to see the detailed discussion of center of buoyancy and center of gravity. I'm in the middle of setting up a new camera housing with lights and it is incredibly difficult to get those centers lined up on a small scale without the cameras "arms and leg" position also being variable. i completely enjoyed the video!

Destin, thanks so much for making this video. It was a treat for you and a pleasure for us. I watched the whole thing over the course of a couple days, and each time it was so enlightening. As you said, this is markedly different than other internet videos and I thank you for making it so we can be brought into this process. Lastly, you said on the internet that editing these takes longer than anyone would think. Thanks for conveying the message in such an approachable manner so that a worship pastor in Ohio can get a glimpse of what working at NASA is like. God bless you!

Excellent video, as always. The most intriguing part for me was at the very end -- the reasons that the ISS (and all other spacecraft) aren't just run at 100 % O2 @ 5 psi. Thanks for that! Also, I just got your postcard and learned that you're hitting your dissertation. Keep up the good work. If your dissertation & defense are anything like your channel, you'll be Dr Destin for sure!

Your revelation to us that you were potentially going to be an astronaut. Was literally jaw dropping. Anyone that consistently watches your work knows how smart you are and everything you show off but that’s like next level

beyond all the fascinating science and engineering, the people that Destin gets to meet and the excitement they get to share with him, and us by extension, is probably my favorite hallmark of this channel.

This is why I love the internet. Last minute I was watching cat memes, now I’m watching astronauts trying on new suit at NASA. Amazing times to be alive.

Thank you for shooting and organizing and uploading these videos!

19:57 this I appreciate this so much. I constantly feel as though others lives are more put together than mine when I see something as simple as a clean room like that. Nobody is perfect and I have to remind myself that.

Destin, if you where amazed by this, i'd suggest you try and visit a saturation diving complex... these people dive at 250 meters deep, and they stay at that pressure for up to a month, they obey another different set of rules than the recreational diver instructors in this NBL lab, they don't decompress from nitrogen, they decompress from helium, i mean, a total different set of deco tables, they use something like 5% oxygen (1,4ppo2), 5% nitrogen, 90% helium, and they do it with a closed circuit from bottom to diving bell to surface boat back down to diving bell to diver at bottom to reuse the helium, with hard hats and warm water suits... it's amazingly complex, way more than space if you remove the rocket... it takes longer to take a diver from working pressure at 250 meters, 25 bar, to the surface, than from space to the surface, it's a more hostile environment deep deep down than out of space.

Love these long form videos, well, anything really that you release. Thank you!

Immense respect for all the people who work hard behind the scenes to make everything possible for the astronauts!

As a retired engineer, I really appreciate the technical theory. Also, the video sent chills down my spine as I remembered my experiances with other engineers to apply the theories to real world problems. This video is AMAZING !!

Having watched the first moon landing live on TV as a kid this was one of the best things I have watched ever since. Great job.

This was longer than usual, but I couldn't stop watching. So much cool information. Thank you!

Thank you for all you do on this channel. Genuinely amazing and genuinely humble.

Behind the scenes as NASA, love it. Years ago in the 90’s my 4th grade teacher’s husband was a Shuttle engineer and he was able to arrange for us a very cool field trip to Kennedy space center inside the large building, and we also got to see the shuttle simulator. He also brought cool stuff from NASA to the school to show for show and tell. It solidified my love for rocketry and space flight.

This video actually got me teary eyed for some reason. Maybe it's the love and dedication of everyone involved, the feeling of humanity pacing towards the futures, the feeling of exploration. Superb video and operation!

Great video Destin! I love your enthusiasm, it is contagious. Watching you get excited about what you were seeing and learning makes it that much more exciting to me.

Thanks for your tv-quality documentaries. It's always fun to watch 😊

“This gets complicated, so obviously we should use a flannel graph” 😂 What a classic statement! And what a winner video - yes please, long format 👍

1:03:40 I *love* that moment of victory that diver shares with the astronaut, that joy, cheer, and flex! Wonderfully encouraging and sweet!

Great choices of ISS experiments! At 1:12:40 the clip shows Michael Hopkins operating the Interior Corner Flow 3 vessel of the Capillary Flow Experiments. I was the design engineer and also lead the flight operations as it was a small team. CFE was Hopper's favorite experiment as he actually requested to do our ops. Great guy that I had the pleasure of training pre-flight and was able to meet with him post flight too.

The amount of knowledge, information, entertainment and joy in this video is just mind boggling. Thank you Destin!

This ticks all my boxes. I'm a diver. I also applied to become an astronaut and was rejected. I'm super excited for the Artemis program. Destin, thanks for letting us come along for the ride and experience these moments with you! We're witnessing the making of history here, the first steps to establishing a permanent presence on the Moon. Just fantastic!

Oh my god, You're the first and only one I've seen talking about, or let alone using a flannelograph for anything in modern days. I tend to joke about bringing the flannelograph back and using it at work for office stuff. And You actually did, applause for that! Ten points out of ten, and I haven't even seen all of this video yet. Keep up the good work, Destin!

Hands down the best content in the world. What a magical shot it was when you first got into the water, seeing how everything is recreated. Thank you for the videos you create!

Marcus House told to come and watch this. Loved it. Learnt so much today. Thank you.

Usually when I spent 1 hour on youtube, I'm demoralized by my lack of productivity, but watching you it felt time well invested, I would watch 3-4 hours version of this happily, great video.

I love how an hour and twenty minute SED video feels like a 20 minute video from any other creator. This was excellent and fascinating and I am excited for the future.

The lady at 50:20 we all know from the unveiling event for some new space suits prototypes a few years ago. Great video about the effort involved in developing space flight technology.

This is perhaps one of your best videos yet Dustin! Absolutely phenomenal.

In the 60s we went to the moon in a Honda Civic. In the 2030s, we'll go back in a small apartment with an attached garage. As a 30 year old space nerd kid, I'm so excited so much is happening in space these days. We sent a helicopter to Mars people!

When you see a new SED video, you stop what you're doing and watch it. It's just what you do...

Long time watcher first time "commenter". Wow Destin this is an incredible video. I found myself grinning from ear to ear at several times. I have to be honest the length of the video did initially turn me off from clicking in but I'm happy I found my way after Marcus had recommended we come to check in. Truly amazing stuff, simplified to a tee, insightful questions, and amazing footage. Thanks again, look forward to more of this PLEASE!

This is absolutely amazing. I had no idea what goes into preparing for an EVA mission. Thanks Destin and the facility team and the Astronauts for giving us this insight.

I was going to watch a small bit of this giant nugget of a video and then sleep some, to continue watching more tomorrow. It is now a few minutes past 6am and I just finished watching the whole thing. Golly was this interesting stuff!

The whole learning to walk in 1/6th G thing is amazing. It's experiencing what it was like to learn to walk as a toddler. The ability to learn and adapt is truly a remarkable thing. Also, I came to the realisation why toddlers trip and stumble as they learn to walk thanks to this video. And of course, the NBL is an amazing place. It would be the experience of a lifetime to get into the pool and just explore the mockups they have.

amazing video Destin, truly fascinating how complex it is to simulate moon surface or orbit... when artemis eventually lands on Moon and we see astronauts taking those steps, ill try to think back to this video of yours! you are doing a great service for NASA and artemis visibility here, people need this kind of stuff to appreciate the huge mountain of work being done behind every flamey rocket show! ps: "long videos" are my favourites, like your tour of ULA with ToryBruno

The fact that we get this kind of quality content on UKposts is amazing. Just a pleasure to watch, thanks Destin and all the smart dedicated people involved here!

I watch this channel to reassure myself that we do actually still have very intelligent humans doing very intelligent things in this country.

Destin - you should reach out to Jared Isaacman if you still want to go to space. You clearly have the smarts to do it and the educational content you could make on a Polaris Dawn mission or some other sort of Commercial Astronaut mission. Tim Dodd is going on the Dear Moon mission - I think you and Scott Manley should both go on one too. As science UKpostsrs with the "nerd chops" to communicate this kind of thing, the three of you could make some AMAZING citizen science missions come alive to inspire the next generation of astronauts. God may not have wanted you to be a NASA astronaut - but maybe check in with Him about commercial space. :) Love the video!

i feel like this is a system we should have more in games, choosing what pressure you want, the more pressure, the quicker deployment, the lower pressure, you get more dexterity. its more complicated than that, but its definitely the nerdy detail i want to see.

Sounds a lot like vessel stability, which I did a lot of in the Navy. Fascinating stuff. We had a program that we could enter different load information in to. We used it to help us what tanks to fill to get to our desired trim. We also just messed around with it to see how different scenarios created different stability issues.

This is such a cool video. I always wondered what it was like inside the NBL. There's not a lot of footage out there actually in the pool. Thanks for sharing this with the world. I learned a lot. I do wonder if this was all shot before or after Smarter Every Day 293 where you gave the presentation criticizing Artemis and Starship because I wonder if this changed your opinion or if this experience informed the opinions expressed in that presentation. I also wonder what kind of feedback you got from that presentation from the people in the room or other people close to Artemis who saw it on the internet. The low fidelity mock up on the floor of the pool was obviously the diameter of a Starship and the elevator is how they'll get down from Starship so that is what they were testing. That video really stuck with me for some reason and I just wondered about that while watching this. Anyway, I'm so jealous. This looked like a lot of fun. Thanks for doing this and sharing it with all of us.

Wow, thank you NASA and Destin. Greetings from Popayan, Colombia.

This was just an incredible video all around. I got serious chills when you went underwater and we could see everything more clearly. Must have been quite the feeling. Thanks to you and everyone at NASA for their absolutely amazing work. The thought that goes into every little part of these missions was on full display and is truly astonishing.

I was a bit reluctant with the length of the video, but it was more than great ! Thank you !

Love all your space-related videos!

Learning you tried to become an astronaut suddenly made EVERY one of your previous videos make more sense. I've loved your adventures - from the goofy to the sciency to the orphanage. This takes the cake. Bravo and blessed Resurrection Day.

This video is amazing! So incredibly interesting and well done. More space exploration themed videos please!

Fantastic.. enjoyable and most importantly understandable.....thankyou

Im amazed with the access you got. Thank you sharing it with us. As an engineer that written quite a few flight test cards in my day, it makes it an easy anxiety free watch knowing and seeing how respectful you are to people that has put months of work in for just hours of data. Thank you sgain.

One of my favorite "perks" of working for my employer was a chance to get a floor "tour" of the NBL and suit lab during an actual training evolution, with the chance to pick everybody's brains on anything any everything even while standing mere feet from the platform while astronauts were fighting to don the suits. There's really nothing else like it anywhere.

Brother that was fantastic! 1:20 min long and the end I wished there was more! Well done.

Great insight to the complexity of doing anything challenging!

That Starship mockup really puts into perspective how big it will be.

I'm a software engineer, but also a GA pilot and have to do CG and moment calculations quite a lot to do weight and balance of the airplane I'm flying. The bit where you explain the way they figure out the CG and CB is super fascinating how it's all balanced out. Thanks for sharing your content. I enjoy learning new things every day.

Brilliant episode, thanks so much. All the best from New Zealand

One of the best content out here in the internet. On one level with BBC documentaries or National Geographic or Terra X. Just incredible, amazing work. Thank you, Destin