Sleeper Ships

[@isaacarthurSFIA]

Happy Thanksgiving everyone!

[@L_mattox]

A happy Thanksgiving to you too, Isaac Arthur

[@JohnSmith-hz5bq]

Sleeping for a hundred years? Sign me up

[@beddows]

Grateful for your videos Isaac!

[@gumunduringigumundsson9344]

Happy thanksgiving!

[@gumunduringigumundsson9344]

@@linyenchin6773 Skin colour is so completely irrelevant it is like me saying oh you taller than 187 cm therefore thou art better somehow... nationality and langauge do not matter. Only care for the future to be cool and fun and ethical is all I ask for. I can only speak for me. GL hf 🐶💜

[@R.Instro]

"Are you human?" "Uh, negative, I am a meat popsicle." =D

[@keimoclayton2844]

Corbin Dallas

[@RB-dn4pj]

What is a meat popsicle anyway?

[@Moonlordnmn]

One possibility for maintaining sanity over time would be one or more virtual worlds that would allow the mind to keep itself busy in.

[@FrostbitexP]

imo, the moment humans are capable of creating virtual worlds, and connecting our brains directly with machinery to experience them, the interest in colonizing the galaxy will be very minimal. As exploring virtual worlds of our own creations (most likely AI creations) will be far more interesting.

[@bobinthewest8559]

@@FrostbitexP … I get your point that folks might lose interest in colonizing the galaxy if they have the option to “lose themselves” in virtual worlds. However…. If humanity should have the good fortune to survive indefinitely, we will eventually have to get out there whether we find it interesting or not. Our sun will not last forever, and at some point, we will need resources no longer available in this solar system. A LONG way off, I know…. But if ALL of us keep ourselves tucked away in some virtual reality, we may have no concept of how to leave, or ever even notice the need to. At some point though, I guess our virtual world would just collapse around us as we die, and that would just be the end of us.

[@abhigyanrastogi1662]

​@@FrostbitexP But anything that we can imagine and create with our minds has a different appeal than anything that exists outside our mind and is beyond our control. The two have separate appeal i think

[@hotman8218]

Wouldn’t it be better to wake them up every couple of years or centuries just to make sure they’re ok?

[@mcmaldek]

Or a big ship with lots of people.

[@richsposato]

Computers that go berserk and kill off the crew on a sleeper ship? The HAL-9000 series is the most reliable computer ever made. No 9000 computer has ever made a mistake or distorted information. We are all, by any practical definition of the words, foolproof and incapable of error.

[@Alexander_Kale]

Plus, really, what can go wrong? The ship has no internal engines, the propulsion is provided entirely by laser. Even if it were to disassemble all the meatbags for optimization and turn the ship into a nanofactory, it's not like the magnificient thing could change course and conquer the universe....

[@calvingreene90]

@@Real M HAl-9000 was ordered to lie and as a result went psychotic trying to obey orders contrary to his core function.

[@Alexander_Kale]

@@calvingreene90 Proving how unreliable he is. Bad programming if you can bust him with a logic bomb. ^.^

[@calvingreene90]

@@@Alexander_Kale Only if the bomb is planted by someone in authority to give him orders and only if planted when he was young. I have seen children go off their rails just as badly from contradictory instructions but they were not in a position do do harm on the same level.

[@Alexander_Kale]

​@@calvingreene90 If the guiding computer acts and thinks like a child, I would STILL call that bad programming. Anything that can be busted with a fucking logic bomb should not be put in charge of anything.

[@cannonfodder4376]

8:04 I was most amused by the SFIA demonstration of various Cryosleep techniques. Was rather unexpected. Another great episode, Isaac. A Happy Thanksgiving to you and everyone working with SFIA. I have learned so much from you and am so thankful for your hard work and passion towards teaching others.

[@davescott7680]

Yeh, love that.

[@TheHellogs4444]

Absolutely LOVE the ending music. Shivers and goosebumps, makes me happy to work for the future.

[@Mimerneos]

Lol, "corpsicles" Happy thanks giving, Isaac!

[@fakshen1973]

I think that was a term first thrown out in the movie "Event Horizon."

[@coreymicallef365]

@@fakshen1973 and the very similar "Capsicle" was use in the first Avengers movie.

[@AvailableUsernameTed]

I remember it from Larry Niven's 'Tales of Known Space' stories. They were written in the 60s and 70s.

[@EventHorizonShow]

Happy Thanksgiving Isaac and everyone!

[@hunam_1]

Happy Thanksgiving, JMG!

[@fsmoura]

Hi Anna ( ❤3❤)

[@pskry]

Ever since my (rather late) subscription, I have now had the pleasure of immersing myself in your excellent content. You have become the voice of my daily commutes which, rather neatly, take roughly half an hour each way. I wanted to express my thanks somewhere, so this video (very loosely dealing with commuting in a way) seemed as good a place any. So thank you for your work! It is highly appreciated!

[@fluffio2976]

Always nice to listen to you Isaac, lovely video!

[@Lukegear]

Wakey wakey sleeper crew Time to watch some Isaac Arthur!

[@Phelan666]

Wake up, time to die.

[@drakkondarkspell]

AI needs to warm up sleepers. "Wakey Wakey shake-n-bakey!"

[@niall2236]

You're my favourite youtuber. So glad I found this chanel

[@AvyScottandFlower]

Ah, I miss Buck Rogers, those early 80s :( That Han Solo bit, though xD

[@kingoliever1]

"so a more appealing option would be to hit the pause button on the crews life´s so today we look at options how we gone do that" i just love scifi and your channel in particular

[@pro126]

Looking forward to the new upgrades have a great new year Isaac

[@ninjaman815]

Happy Isaac Arthursday and a Thanksgiving Everyone

[@johnwang9914]

The AI could be reset to factory defaults frequently. Every day could be it's first day on the job.

[@asmithgames5926]

WP: The ship accidentally puts the crew to sleep for billions of years. They wake up in another galaxy, with the Sun having already burnt out. However, the Ship has had lots of time to improve its intelligence and create wonderful inventions.

[@theuncalledfor]

Doesn't it take many trillions, if not quadrillions, of years for a properly maintained Sun to burn out? Do you really think humanity would be so neglectful as to let the Sun die of its natural course of development? (See SFIA episode on Starlifting if you don't know what I'm talking about.)

[@theuncalledfor]

@bryan diaz varela Sun. Also known as Sol. The star of the Sol System, in which planet Earth is located. Only one Sun exists. What you mean is a star, of which the Sun is one. Also, scientists have good estimates, as much is known about the mechanisms that drive stars.

[@0326jlc]

Ya Red Dwarf was hilarious but Holly didn’t invent much.

[@shawnwales696]

@bryan diaz varela Astrophysicists can extrapolate based on the observations made to date.

[@ajhobby254]

Isaac, your videos make my day and constantly inspire me. Thank you for all your hard work!

[@isaacarthurSFIA]

Thanks Allison!

[@JoelDowdell]

Happy thanksgiving all! Awesome episode as usual. Also, just casually saying, "We'll discuss options like that later on in the series..." always makes me impatient for the next episode.

[@stephenbaldassarre2289]

24:16 "Prepare ship for ludicrous speed!!!"

[@taylorkitchens578]

You're a living wonder of the internet, Isaac. Never stop.

[@exoplanets]

Guys, if your hibernation machine fails before reaching Tau Ceti e and you wake up way too early, would you awake someone in the spaceship in order to have company? (like in the movie 'Passengers')

[@TheSmilingLord]

Or like Red Dwarf?

[@stebbigu]

Like in the movie I would probably try to stop myself from doing it, but eventually I would wake some hot Scarlet up to kepp me company. I think most ppl would definitely do it due to loneliness.

[@stefanr8232]

Allen Steels' book Coyote has this. Not on the way to Tau Ceti but a passenger wakes up.

[@marztar]

I would put shaving cream on their hand and tickle their nose... And wait and wait and wait... chuckling to myself of the reaction... in 100 years!

[@nias2631]

What would really suck is having some sick bastard who loved raping people while they are drugged out be the one to wake up. Basically its party time for a few decades as far as they are concerned.

[@valrond]

Just in time to take a coffee a d a snack. Thank you Mr. Arthur.

[@matthewgardner5364]

Happy Arthur Thursday and Happy Thanksgiving everyone. Imagine what a thanksgiving would be like in Martian gravity. Imagine the arguments people would have at the table

[@gumunduringigumundsson9344]

LoL. The breadstick and the pudding could finally be thrown right across the hall. Sweet!

[@natewasylik1576]

Slams table, jumps from chair

[@numberjackfiutro7412]

And you could stomp down a corridor without much effort.

[@Datan0de]

Another great video! A couple of points: 1- The two main reasons for doing head-only ("neuro") cryosuspension instead of whole body are that it's cheaper and that it's easier to ensure complete perfusion of the cryoprotectants (different organs perfuse at different rates). I don't know that either one really applies to this use case. The perfusion problem has already been largely overcome, and it seems like the cost in mass and materials to include an entire body growing and head transplant system would outweigh the minimal savings. 2- Has anyone else here played the (free) Android game "Seedship"? It fits into the topic of this video perfectly, as you play as the AI managing a sleeper ship, trying to protect the passengers and find a suitable new home. For a relatively simple game, it's a lot of fun!

[@beakytwitch7905]

Wow, talk about mind expanding ! In one of your films you mentioned the book by Robert Heinlein "Orphans of th Sky", so out of interest I bought the book. My copy was printed in 1965... It is a wonderful Sci Fi novel, and amazingly it also speaks of a liability with ONeil cylinder ships that take generations to transit between the stars. I read the book as a boy, and reading it again as a pensioner now with space travel becoming a reality, my mind boggles!!!! It is a lovely tale. :-). Keep up your mind-stretching work. :-). :-)

[@cluckeryduckery261]

haha it's thanksgiving man. lol you're allowed to take a break!

[@isaacarthurSFIA]

:) I am, turkey just went in the oven. Releasing the video only takes about half an hour, they generally get written 2 months out and produced a week or two before. I suppose replying to the comments is still technically work but probably my favorite part after the writing portion.

[@Jameson1776]

Isaac Arthur my thanksgiving got cancelled can I come by?

[@Jameson1776]

Isaac Arthur jk about coming by I’m in St.louis although if you cook it slow it might still be warm bye the time I could make it to Ohio.

[@Robert-mx3id]

and all the genius energies diluted,,,NO,,,,pls ,,, no melting in gravey

[@cubertthegrox2138]

Happy Thanksgiving and Arthursday

[@chandick1620]

1:48 spinning weed plants ensure supply of pot for the arrival celebration

[@SempSSY]

Drinks and the smell of cooking for me and the kiddo's. Happy Arthursday everyone!!

[@JimGiant]

The idea of being killed by a time gradient is pretty dark. Imagine your feet slowly aging to look like a 100 year olds, the muscles wasting, bones becoming brittle and becoming tumourous before needing amputation.

[@infinitasalo472]

Reminds me of the scene in the 2002 version of The Time Machine where the Morlock is wasting away because half of his body is hanging outside of the machine

[@JimGiant]

Haven't seen it, is it worth watching?

[@digitalnomad9985]

@@infinitasalo472 One of Niven's ARM SF "detective" shorts has a character narrowly escape that fate. A more immediate fate than "aging" is that the limb is not receiving enough blood to oxygenate it if the body core is in a "slower" realm.

[@paulwalsh2344]

... Yeah, that happened in Alastair Reynolds' "Galactic North" story too. Also in that story, the protagonist, the Captain of the Cryo Sleeper ship was somehow mentally conditioned to behave with an overwhelming protective mother instinct over her sleeping cargo. That's my all-time fav story of the "Revelation Space" series by Reynolds.

[@TheTyrial86]

@@JimGiant Yes it is. It was pretty good

[@matiasbascunan8051]

Yours is the best channel out there, truly. Thank you.

[@marinuslouis]

Loved the Desktop Cryo-Experiment!!!

[@macaroni1139]

Love your channel and the high quality of your episodes. Cheers Isaac!

[@mikelfunderburk5912]

Hope everyone is having a good Thanksgiving. I know I am. And now that S.F.I.A. is on, its even better.

[@PhoenixNL72-DEGA-]

Everyone is very unlikely. I'm from Europe. (And a lot of Isaacs viewers are from outside the USA.) We don't have Thanksgiving. I however am looking forward to Sinterklaas.

[@mikelfunderburk5912]

Robert Phoenix I am Native American and German. My grandfather's parents were born in Germany and my grandmother was 1st gen Native American and French. We have always celebrated it. I do realize some of the audience is not from the states. Hope everyone had a great day anyway.

[@PhoenixNL72-DEGA-]

@@mikelfunderburk5912 To be honest I don't even know what the exact date of thanksgiving is. I only know it's somewhere in november or something. So can't really say if I had a great day on the actual date ;) (Same thing with Halloween. Also something that is traditionally not celebrated over here. Though candy companies and the like are trying to push it through. Like they did with valentines day. Which also wasn't a thing over here when I was a teen and still a lot of people don't do anything special on that day.)

[@mikelfunderburk5912]

Robert Phoenix Indeed, they are both marketing gimmicks in the U.S. along with xmas. All pegan in origin with a twist of Catholics thrown in. Melting pot at Its finest. lol

[@ihaveyoud9553]

Thanks for uploading, and happy thanksgiving everyone!

[@TheNoodlyAppendage]

24:15 LUDICROUS SPEED ENGAGE!!!!!!

[@dennisbeers]

Happy Thanksgiving Arthur.

[@fernandobernal6506]

Same for you Mr Isaac

[@jkj420]

Wow! This is a really fascinating subject! Thanks Arthur and the Team :-)

[@danderrico]

happy thanksgiving to Issac Arthur!!

[@isaacarthurSFIA]

You too Daniel!

[@pauliether.c.guy.3349]

You Issac happy thanksgiving buddy.I want to tell you since I discovered your Channel I have been so happy. When ever I get a notification from you I literally jump out of my skin I’m so excited. Keep up The awesome work bud.

[@JC34258]

16:15 "Which would imply a decent chance any frozen crew woken up for routine maintenance activities might just be activated, body or brain still frozen but conscious and piloting a robot." That is a _Glorious_ mental image. Thank you for this. Riggers represent!

[@Elmithian]

Question: What about having multiple Ai that work together much like a crew on a ship but can take over the job of one another if one of them is deemed a danger to the ship or unstable? Could be everything from 3 AI to dozens of AI. As a backup when one (or more) of those AI is marked as a risk. A number of the crew is woken up just in case the AI tries to go rogue. With the crew having physical master keys that lead to where the AI cores are stored and kept safe? Redundancy and backup plans for the backup plans are always some of the better methods to keep things safe and sound after all.

[@paulwalsh2344]

Good idea. That's a lot of what I was thinking.

[@nkordich]

"As a backup when one (or more) of those AI is marked as a risk. A number of the crew is woken up just in case the AI tries to go rogue. With the crew having physical master keys that lead to where the AI cores are stored and kept safe?" Narratively/psychologically speaking, that makes the crew a threat to rogue AI, or an AI accused of being rogue. While 2010: the Year We Make Contact gives its own reason for HAL jettisoning the crew, my interpretation of 2001 was that HAL was given conflicting priorities, placing the success of the mission above the well-being of the crew. Given how faultless the HAL series had been up to that point, yet how fallible humans are, HAL calculated that the mission had a greater chance of failure with the human crew than without it, particularly at the point that the humans start doubting him as a result of the predicted antenna failure being a false alarm.

[@Elmithian]

@@nkordich Mate. I am a threat to everyone around me. So is everyone else to everyone else around them. Every living creature can be considered a threat of sorts. By the same logic you mentioned, the AI would be even larger threat to the humans if they didn't have any counter-measures. Simply by making it possible to counter its threat do you create a balance where both parties can be equally damaging. Thus creating the potential of a truce, or even cooperation of sorts rather than one party holding a gun to everyone's heads. I know it sounds a bit extreme but I have no doubt that this would likely be the best method for the first few generations of proper ai. Later, once both parties have built up sufficient trust with one another can you lower your defenses a bit. Trust is earned. Not given. I expect this to apply to true AI just as strongly as it is applies to humans.

[@HuntingTarg]

@@Elmithian Trust is _merited._ Rereading _Speed of Trust_ by Stephen M.R. Covey (the son of the author of _The 7 Habits of Highly Effective People_ ) : Extending trust is always a conscientious choice, one that can be refused; and is also always a risk, because there's always a possibility that trust will be broken. Whether an AI will accept this risk or resolve it by attempting to 'remove' the crew is a tricky problem, and a long-lived sci-fi theme.

[@HuntingTarg]

The solution to 'what if an AI goes rogue' is to combine two approaches: a rotational or generational crew and a 1-3 AI system in *symbiosis* , i.e. each has tasks that benefit the other group, that the other group cannot perform. This is easy to contrive if there are physical tasks that the ship AIs could not possibly do on their own (i.e. have no access to robotics or ability to build them). Whether this is an undue risk to the crew is another matter, but it would serve to keep both groups responsible and accountable.

[@Daimon-X]

"Sleep and his Half-brother Death" Good night sleep tight don't let the xenomorph bite...

[@GeeMannn]

Awesome video! I have been waiting for you to cover this for a while now! also 18:40 AYY LMAO

[@sobertillnoon]

You should have gotten a Casper mattress sponsorship before doing this episode.

[@AceTycho]

Ha true!

[@LH1980XX]

Space piracy will be awesome. The crew are literally asleep and the ship is travelling slowly at a predictable path.

[@marlonlacert8133]

The poor space pirates, might sleep past a given target! Or go to sleep, only to wake up and find that they too have been robbed!

[@zeekfromthecreek]

If that happens, the space pirates will probably be robots. Human space pirates would need to use cold sleep themselves, just as much as their victims.

[@theuncalledfor]

@@zeekfromthecreek They could be digitized humans in robotic bodies. Speaking of which, I keep thinking it has to be possible somehow to get digitized without having to copy yourself, leaving behind a sad meatbag that hoped to be the copy that gets to be digital. Like gradually replacing parts of your brain until you're fully digital. Or spreading your consciousness out among multiple bodies, so each body is redundant to your true, full self, so you can remove any bodies that use biological computational components until you're fully digital.

[@HuntingTarg]

@@theuncalledfor I wouldn't want to be fully digital; human bodies may be fragile, but I would not like the idea that someone could suddenly 'pull my plug' without any foreknowledge, awareness, or power to prevent it. Then again, looking at distributed computing and storage IT in use now, I wonder if AI would even have the same kind of awareness and consciousness we do... So no, I will openly consider being genetically enhanced, or cyborged, or both, but no digital transference for me.

[@theuncalledfor]

@@HuntingTarg How would someone pull the plug on a body you own, that has its own power supply and mobility? It would be like trying to pull the plug on your actual fleshy body. And unless you're the first person to undergo the procedure, you'd know in advance, from many other people's experience, how different their awareness is. And your body could be anything. Even an independent space vessel with solar panels and batteries and maybe a backup nuclear reactor, as well as mining and auto-repair systems.

[@crazyahhkmed]

Can't wait for the Methuselah ships episode. I firmly believe that we'll have practical life extension long before viable interstellar travel. Hell, transhumanism is practically needed for all the mega projects discussed on the channel. At the very least they go hand in hand. Issac kind of alluded to this in the episode on Purpose and others.

[@RobertResearchRadios]

This is a question for Isaac or someone else with an advanced physics background focused in gravity and GR: What are some scholarly references (white papers) for the gravitational stasis field concept presented at (28:30)? It's hard to sift through the BS pop sci, and I'm not so sure of a good quantitative description of the effects of placing yourself at the equilibrium point between 2 parallel gravitational wells also placing you down a well relative to someone sufficiently far away from either well in free space. I'm not sure there will be an easy description given the field geometry isn't nearly as simple as symmetric FRW spacetime, but it would be cool to find a good paper that at least attempts to tackle the concept in detail.

[@UsAsWeAre]

I find literally every episode of your show incredible, including this one, but for *some reason* found it very hard to stay awake!

[@valkie931]

*HAPPY THANKSGIVING ISAAC! :)*

[@Edenssunlight]

Happy Thanksgiving and Arthursday!! What a combo!! Going deep on the snacks today!! Thank you Isaac !!

[@ferdinand7467]

I prefer the "forever war" method: -Point in the right direction -Hit 50G's

[@thomasbeaumont3668]

What is the forever war method sir

[@seven3163]

It's Isaac, my evening has been saved :D

[@EddyA1337]

Arthur I have a question I haven't been able to find an answer to. It is this: Does time dilation from general and special relativity stack? Let's say I was travelling at 99.99999% lightspeed orbiting just outside the event horizon of a supermassive black hole. Would time slow down more from time dilation from special AND general relativity rather than say if I was just near a gravity well or travelling at high velocity alone? Do they both combine to slow down time further for the outside observer?

[@isaacarthurSFIA]

Yeah they stack, though adding them together is not simplistic.

[@arnoldshmitt4969]

really enjoyed this episode thanks Isaac

[@adankseasonads935]

Happy Thanksgiving Issac! Thanks for another awesome video!

[@africanelectron751]

Get so excited when I see Mr Arthur has a a new video.

[@gabrielmicu4085]

So happy, is Arthurday!

[@username-jc2tp]

This channel is the non-fiction version of Alastair Reynolds. I love it.

[@shaddxhizion]

I am really taking a liking to this Clarketech idea.

[@davidgifford8112]

Cryonics may be a key component in future space travel. Although limited torpor techniques are now being employed in emergency and intensive care medicine, how cool you can go is very limited as major organ systems fail much below 32C. The metabolic slowing is limited for extended space travel. How to alter human metabolism to achieve meaningful gains in metabolic slowdown without killing the subject is unknown right now. Animals that do this, often wake periodically and can only use this trick over a few months. Cryonics holds better prospects. There are hints at techniques that can eliminate ice crystal damage during and techniques that can allow for the more dangerous rewarding phase before reanimation.

[@Datan0de]

We already have techniques for eliminating (at least mostly) ice crystal formation. People who are put into cryonic suspension first have their blood and intracellular water replaced with cryoprotectants that don't expand or crystalize when subjected to ultra low temperatures. They're effectively turned into a form of glass.

[@davidgifford8112]

Datan0de In the real world there is still a lot of ice formation during cryonic suspension, hence the concentration on heads (Russians even have brain only preservations). How many have been successfully revived? One baby rabbit kidney. Ice formation during rewarming is a bigger problem problem than cooling as not all water is eliminated.

[@InfinityAndParadox]

Another great episode Isaac! So many possibilities to uncover. Until we uncover them all let's tell ourselves some nice bedtime stories.

[@proknight6647]

so informational. great job Issac

[@mongoslade5248]

@9:54 Build a"Welcome city". So that the travelers have a point of reference, before choosing REintergration back into their NEW society.

[@mavisdavies9769]

Hey guys, SFIA episode. Let's go

[@pleasestandby5954]

Another way to get humans to a distant planet/galaxy would be to have fully AI controlled ships make the journey without a human crew, which then grow people from a dna store once the planet has been prepared for them.

[@ahmedwael3824]

Happy Thanksgiving and Arthursday everyone

[@annoyed707]

Thanks, but you are about six weeks late for Canadian Thanksgiving. Were you.... sleeping? ;)

[@ahmedwael3824]

annoyed707 Canadian thanksgiving is a thing?

[@stekra3159]

Since in a a O´Nile Cylinder has operant gravity. And gravity slows downtime relative to the universe. That being the case can you slow down time in a Cylinder? And if that is the case how fast do you have to spin it to get the time gett when you travel at 99% c?

[@theuncalledfor]

Remember that a cylinder falls apart if you spin it too fast. Materials have limitations.

[@paulwalsh2344]

Not to mention the deleterious effects such a rapid centrifuge would have on a biological body.

[@brianmessemer2973]

Key food on Sleeper Ships: Turkey 🦃 with tryptophan 😴😴😴😂😂😂

[@isaacarthurSFIA]

I'm kicking myself for not making a turkey/trpytophan reference now :)

[@No_OneV]

Great video as always

[@hanshenrikbuttner9340]

I was wondering.. Won't most interior decay over time in some form during travel? Wirering etc.

[@icecold9511]

That is in my view the real challenge. Metal fatigue, organics breaking down, and even how do you get a nuclear reactor to work that long? How about the computer OS? I dealt with this in a book by putting the whole ship in time dilation. But that's fiction and I'm betting that in real life that creates new problems. What if cosmic rays stacked up into a massive wave of particles?

[@avanconia]

He gave us one extra episode, and now my schedule is completely thrown off and every episode feels like an extra episode.

[@bjrnbjrnsson4012]

Happy thanksgiving Isaac!

[@seacucumberable]

This channel is so goddamned awesome.

[@anthonystark3959]

After 1000 years on deep sleep, you finnaly reaching your planet destination. Surprise, your destination has been colonized by your descendant since 375 years ago, after they found a way to made jump gate.

[@firewolfquasar4230]

I just bought survicing mars and one of my first 12 colonists where named Isaac Arthur.

[@SmartK8]

Great episode.

[@assarstromblad3280]

As always, very interesting topcis that I usually think about but cant find anything about elsewere. Love it :)

[@DanStevenson]

The Alaskan wood frog freezes solid every winter then thaws alive and well in the spring. These frogs have rates of glucose and urea in their blood.

[@fritzsedney9268]

A great vid Arthur, thanks. Hey, I was wondering if you could make a video about something you've mentioned briefly in this video regarding mind augmentation to allow shared dream states, just like in the movie inception. I've always wondered if this is really possible and how it can be achieved. Thanks once again and keep up the good work.

[@arthurdsjrjbr]

Can you do a video on Alcubierre Warp Drive?

[@randomperson-ws3zq]

He already has

[@becausereasons8981]

You know I actually find Isaac's voice fairly soothing even if he has a lisp or whatever it is. Doesn't bother me, just makes me think he from a diff part of the world. (haha, aren't we all?!)

[@gumunduringigumundsson9344]

Happy Arthursday everyone!

[@johnwang9914]

For interstellar travel if FTL proves impossible, I would imagine the digital preservation of neural networks with either the operation of android avatars by simulated consciousness or the bioprinting of new organic bodies when needed. This also allows for a simulated digital crew to monitor the ships status and decide which options to take. Note, presumably you mentioned hydrogen sulfide to reference Roth's work on mice hibernation. First, there's no evidence that hibernation slows or stops aging, Roth continued with an analog which I believe was Sodium Sulfide but unfortunately with little success and lowering our body temperature subjects us to fungal attacks, never mind genetic degradation to cosmic radiation so hibernation may be of little use in interstellar travel.

[@thedoruk6324]

Happy Arthusdays everyone; He gave us a delocious turkey to feast on ! :)

[@gumunduringigumundsson9344]

What are we kids in neverland with Peter Pan and noone told me until I'm 36... I should be working for Hook by now. But. Turkey sounds better! Lets feast! 😊

[@km5405]

why do I immediately imagine some kind of derelict drifting ship which harbors some kind of unspeakable biohazard when I hear the term ''sleeper ship''

[@digitalnomad9985]

Subliminal association with the term "sleeper cell"?

[@km5405]

well...maybe it wasn't a accident....

[@TheOxReport]

various deep space stories use it as a sub of the "sleeper agent" trope.

[@charleslasley5367]

Because people fear what they don't understand plain and simple.

[@alanc2165]

For those of you interested in cryonics or being cryopreserved after you "deanimate", I'd like to let you know that whole body cryopreservation is still rather common and not significantly more expensive. The other thing is that it's likely cheaper than you might expect, more akin to luxury car. Most people use life insurance that pays out to the cryonics organization to pay for it and the remainder can be paid out to survivors, donated or placed in a trust fund that can be used in the future. If you are reasonably healthy, that insurance likely only costs a few quantum cheeseburgers a month. Full disclosure, I work for and am a member of the American Cryonics Society and I recommend them to anyone interested. Call or email us, there’s no commitment needed. Personally, I hope life extension happens first and we make it to the future the long way, but there’s no reason to not have some insurance to make sure you get there. Happy Thanksgiving!

[@Datan0de]

Alcor member here. I was skimming the comments to see if any other cryonicists were commenting. You guys are doing great work!

[@jetflaque8187]

Amazing episode

[@SacredCowStockyards]

24:20 why not travel at Maximum Plaid speed instead?

[@R_C420]

Last time I was this early my sleeper pod had broken down.

[@andrewcowlin7704]

2:03 "whereas your acceleration energy" (etc) // if you can beam lasers at the ship to push it with light sails then you can also beam lasers, radio waves or any other electromagnetic radiation (they all travel at the speed of light in space so take your pick) at it to power its internal systems, it doesn't have to be only for acceleration.

[@toffeecrisp2146]

Absolutely Love the very scientific experiement with Han Solo! :D

[@Rolypoly98]

+1 for House of Suns, it's become one of my favourite books :)

[@freddycuba8298]

Best youtuber hands down !

[@supercalifragic1551]

Man I wish I had the temperament to write a book. I'm stuck just daydreaming and scribbling interesting notes and concepts down all over the place.

[@AugustusBohn0]

That's not keeping you from writing a story, it's step one to writing a story.

[@ronnielenroberts6136]

Imagine the shock to see their destination no longer exist after traveling for eons.

[@PhilosopherRex]

I reckon we will get to the upload phase before we are sending interstellar ships ... so as an uploaded being, you just reduce your ships cpu clock cycles and your subjective time - shifts - giving you the experience of super fast travel.