Thanks so much for watching everybody, and thanks to our sponsor - head to www.Brilliant.org/CoolWorlds to learn more! Let me know down below whether you think intelligence could persist and whether NASA should fly a technosignature mission?

@thomasfholland

2 жыл бұрын

After watching my Dad go to work his whole life at NASA/JPL I’ve come to the conclusion that NASA should invest $10billion into a space prob which will be searching for the technosignature. It’s only logical given the expense being plowed into the James Webb Space Telescope. Cover both your bases, not just one.

@yusufansari790

2 жыл бұрын

Your videos are so calm, soothing and highly informative, i always watch them before sleeping. Thankyou for this contribution to humanity.

@worklion50

2 жыл бұрын

Love everything about this channel. Government should fund what you do here. File for some grants, this content is world class worthy. We need to invest in the present, and future, by education like this.

@animatedarchitecture

2 жыл бұрын

to add to the argument technosignatures would not be limited to just planets, similar to voyager program there could be beacons and what not moving about if there is other intelligent life

@XxTheAwokenOnexX

2 жыл бұрын

My take on this is. Biosignature's are easier for humans to detect, and we have the technology to achieve this across the universe Technosignatures on the other hand would be harder for humans to detect, to the point that humans probably do not have the advanced technology to detect Alien technosignatures. Thankyou for giving us another great video cool worlds. Respect

"In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move." - Douglas Adams

@jjt1881

2 жыл бұрын

🤣🤣🤣

@jimmywrangles

2 жыл бұрын

There is a theory that if the universe is ever worked out it will vanish and be replaced by something even more inexplicable. There is another theory that this has already happened.....more than once.

@Boris_Chang

2 жыл бұрын

Ialdabaoth

@regidus

2 жыл бұрын

"My names not important" - Slarty Bartfast

@johnkesich8696

2 жыл бұрын

My initial reaction to the title, "What If Intelligence Re-Emerges?" - Someone finally seeing that somewhere along the line it disappeared.

You've become a nightly friend who lulls me to sleep with these astronomically stimulating videos brotha! Thank you so much for your absolutely top notch content. You deserve so many more viewers

@ismaeelrims

2 жыл бұрын

I never complete his video ... i.e sleep before it's over

@vetakousting

2 жыл бұрын

@@ismaeelrims same, but now i cannot go to sleep. Without having astronomy video running lol

@coltonprivett5221

2 жыл бұрын

You described it perfectly, doing this right now lol

@lucasd1646

2 жыл бұрын

His voice and general tone is extremely soothing.

@Bekfst

2 жыл бұрын

You should check out SEA aswell mate

when you say "we should be OPEN, just OPEN, to the possibility..." is music to my ears. You are truly a serious free thinker

@user-jg2pb3io6l

Ай бұрын

Maybe, what Did the throne of the true thinker look like?

Once I press the play button for this channel, time becomes irrelevant. Whatever time, day or night. I get ready for a journey into interstellar space and beyond. Not just with my imagination but with concrete mathimatical data and expert analytics. Outstanding is not up to par in a one word description of what you have brought to the world audience with this spectacular channel. May you keep on increasing your subscribers and please keep these rarest of gems available for us all. Thank you! 😃

I’m an “O” level educated “senior” who grew up during the Apollo age and fascinated by matters science. Without being patronising, your descriptions are fantastic in achieving a level of understanding in my limited intellect on subjects that enthuse me but that I once thought were beyond my comprehension! Thanks Cool Worlds!!

@CoolWorldsLab

2 жыл бұрын

Glad you enjoyed!

@RobLittleuk

2 жыл бұрын

@@Outist a psychiatrist maybe

@TOMAS-lh4er

2 жыл бұрын

YES !!Im 70 and this guy really makes things so understandable, the channel "SEA" is the only other one in this class !! I also didnt think I would ever understand this stuff !

@RobLittleuk

2 жыл бұрын

@@TOMAS-lh4er thank goodness it’s not just me 😁

@TOMAS-lh4er

2 жыл бұрын

@@RobLittleuk YAH BUDDY !!

Man, along with that music, I could listen to you talking for hours.

@trevorperry3457

2 жыл бұрын

Isn't there another KZread channel with the same host? I feel like it was more focused on space travel and phenomenon.

@daniebello

2 жыл бұрын

I have a bit of a crush on him 🥴

@mimimaitri1

2 жыл бұрын

@@daniebello Who doesn’t?!

@Shutupandsquatnow

2 жыл бұрын

@@trevorperry3457 a link to that would be helpful. 😁

@reisbelramirez3928

2 жыл бұрын

Youre right like Bob Ross

Another video where you manage to explain things in a way that is understandable and fascinating at the same time. I am 53 - no real education other than books - reading - and yet you put things in a way which allows a greater sense of understanding than many others do. Thank you.

This is the best channel on KZread. Once I found you, I have been listening and watching nearly daily. Physics and astronomy have always interested me and your videos have just enough nerdy details to keep people like me engaged, but are also simple enough to be palatable by anyone. Your voice tone, combined with your accent (I'm in the US), helps to keep these sometimes uncomfortable topics calm and tranquil. I am hooked! Thank you for your content!

Videos are few and far between, but like V-Sauce, you know it's ALWAYS going to the highest quality of content. I love these videos and when one comes out it's basically a popcorn and lights off big screen event.

@carletouk

2 жыл бұрын

Check out Parallax nick . History and physics and eloquence rolled into one

@wooddogg8

2 жыл бұрын

@@carletouk yes, just discovered Nick's channel, the local neighborhood series is awesome.

@starly1974

2 жыл бұрын

Cool worldls uploads pretty often in my opinion. One of my favorite YT channels ever "Lemmino" has top tier content, but usually uploads only twice a year.

This channel has giving me so many new ideas to dwell on. I cannot thank you enough for giving me this whole new world of dreadful wonder. From the bottom of my heart, thank you.

@theexplorer9905

2 жыл бұрын

I agree

@timwhite5562

2 жыл бұрын

Yeah, sometimes it's great, and others i just end up in an existential black hole. Sometimes LITERALLY a black hole.

@foxielady777

2 жыл бұрын

You just put to words what I've been trying to name all my life. Ever since I was a kid reading astronomy books I never understood why every bit of info scared me so much yet I couldn't stop reading. Dreadful wonder.

@madzangels

2 жыл бұрын

Your profile pic is horrifying

@tokiamsterdam3219

2 жыл бұрын

@@madzangels thanks.

As most people are suggesting in one way or another, you have an amazing way of bringing understanding to these concepts that I've never really seen before. I watch this kind of content all the time, but Cool Worlds is now my favorite channel! Please keep them coming.

I love this channel. Keep up the great work. And I use work explicitly because this isn't simply content. Investigating, theorizing, and presenting this information in an enthralling way is all the rave.

Prof. Kipping, your knowledge, your calm enthusiasm for the subject matter, your clarity of communication, your respect for the listener's intelligence, and your production value are always a breath of ionized air and a source of inspiration. You're one of my favorite science explainers, up there with Sagan and Tyson. Thanks for this brilliant channel, a gift to science enthusiasts all over the world.

@pirateroberts7684

2 жыл бұрын

Second that

@beenaturalinc

2 жыл бұрын

I agree.

@nenmaster5218

2 жыл бұрын

Amatzing Autism-Videos come from Hbomberguy, Paige Layle and Cynical Reviews, though all 3 tackle this differently and uniquely.

@jonathanmartin7287

9 ай бұрын

Agreed

One issue with technosignatures is that it could be hard to know what to look for. Radio waves and lasers might be outdated after a few hundred years. Dyson swarms are pretty speculative, maybe energy is not the limiting factor for super advanced intelligence. It's all speculation.

@16xthedetail76

2 жыл бұрын

His lifes work is mostly comprised of looking for techno-sigs so its obvious hes pretty salty aha.

@Burbanana

2 жыл бұрын

@@16xthedetail76 doesnt seem salty to me at all

@16xthedetail76

2 жыл бұрын

@@Burbanana He is.

@stevenbrodeur3023

2 жыл бұрын

Exactly what I was coming to say. We're moving away from long range radio waves already. Most signals are done with satelites (short range) and fiberoptics. Bio is 100% the way to go. I feel like if were going to discover a tech sig itll kinda just happn

@16xthedetail76

2 жыл бұрын

@@stevenbrodeur3023 Pretty shallow way of thinking about it and also like you dont even know what you're talking about. Simple fact is bio sigs are easily clouded and picked up whereas techno sigs are not. Do i need to give you a prep lecture?

I listen to your videos while I do other stuff and I feel stimulated all day, thank you very much for helping me escape the mundane with your amazing content, you are definitely one of my favourite youtubers! -Kindly, an italian subscriber

Your balance of storytelling and ‘to-the-point’ science is absolutely perfect!

Being a Space Enthusiast since I was 8 years old, I have an insatiable appetite for everything space. Considering I`m now 77 and in 2 weeks I will be 78 I`m now waiting to see what happens next with space. Elon Musk has been busy filling in all the dreams of all us space-focused enthusiasts. But so are the astronomers who have recently discovered exoplanets of all kinds. I`m hoping that I live long enough to see the last chapter of the Space saga with a trip to mars and the discovery of life on another world on one of the exoplanets we are discovering. My older sister has already passed the dividing line which means you are taking after My mother`s family and not my Dad`s at around 80 or 79. My mother lived to be 95. So David, keep at it so I get to see the last chapter.

@miguelrodriguez-pe1ss

Жыл бұрын

Hey Gary, im 20 and in the same boat as you. I feel that I can die happily in peace once life is discovered outside of our own, whether it's large multicellular organisms, or even just microscopic life elsewhere.

@jgiraldo__

Жыл бұрын

Hope this year has been good to your space enthusiast side! I can't wait to see what the future has coming. My best wishes.

@Tigs2

Жыл бұрын

Gary, I was aged 9 when my headmaster ushered us into the school hall and made us sit down in front of the black and white TV to watch the moon landing. I was lucky to push and shove onto the front row. Since that day my dreams have been in the stars. I became a career combat pilot with the express desire of getting an exchange posting to the US space program but sadly a shortage of such places at my time meant no joy for me. I am now 62 and like you, want to see man venture to Mars. I wish Musk would get rid of his current distraction and concentrate on the great work he was doing. Just to find life, simple organisms even would show me we are not alone in this vast universe. Maths and probability would suggest we are. I hope not, so much beauty to see and discover if only humans could just grow up. I hope you see your dreams too.

@The.Cow96

Жыл бұрын

Hope you're doing well Gary

@newagain9964

Жыл бұрын

C’mon man. Colonizing mars is not only suboptimal, but unrealistic. But if Musk et al 🤡 want use THEIR OWN $$ on mars have at it (plot twist, they won’t!).

As a philosopher, whenever I watch your videos I get this strong feeling that we are kindred spirits. Magnificent content, scientifically accurate, and philosophically deep. 👍👍

@annedrieck7316

2 жыл бұрын

If I were to stare at the mirror of eriset, what will i have in my pocket?

@Psalm1101

2 жыл бұрын

Designed like everything

@madzangels

2 жыл бұрын

@@annedrieck7316 David Beckham

@hugh.g.rection5906

Жыл бұрын

finna get dat philosophy on yo

Every video... Can't begin to explain. I have never seen someone with ideas so similar to my own, but from someone with SO MUCH more knowledge. Fantastic!

Excellent video and fascinating topic. Your delivery is cogent and very well narrated. Well done!

I absolutely adore channels like yours, Isaac Arthur, Arvin ash, pbs space time, and the history of the universe. All such perfect channels. Thank you for making such great content

@boondockflock

2 жыл бұрын

You need John Michael godier in your life

@Friendway

2 жыл бұрын

@@boondockflock I was just going to say that

@boondockflock

2 жыл бұрын

@@Friendway jmg is the best... Don't get me wrong I like these other channels... But yeah jmg gets the gold

@azharshaikh4174

2 жыл бұрын

Also check out SEA, you'll love it.

@Low_commotion

2 жыл бұрын

They're all really good, but Isaac's channel is my favorite.

Voyager 1 & 2 are techno monuments that will outlive earth itself

@peNdantry

2 жыл бұрын

Probably true. But a minor drawback, from the point of view of detecting technosignatures: they're teeny-tiny, extremely hard to spot.

@SoulDelSol

2 жыл бұрын

@@peNdantry they're hidden in vast darkness yes. They're is no gravitational signature etc. It's like finding a single grain of sand floating 2 miles below ocean surface. Chances are it would never be found and possibly be destroyed at some point. Perhaps it's best bet would be to get grabbed in an orbit around a distant star. And what a red herring that would be!! If 10 billion years from now it is found orbiting another star system 3 billion light years away, then "they" may think it originated from that star system and look hopelessly at each planet and moon within. The thought experiment lends credence to idea of extra cellular "sperm" spreading life across galaxy, like dandelion seed puff caught in wind

@anshulbhardwaj4038

2 жыл бұрын

@@SoulDelSol Earth will recapture it in future like 40-50 million years If obviously it survives.its not going interstaller too slow for that.though television signals we have been droadcasting has gone interstaller creating a 70 light year sphere around Earth.

@lgerheart

2 жыл бұрын

Voyager 1 & 2 are our ʻOumuamua gifts to another intelligent species out in the abyss. Just sayin ;)

@anshulbhardwaj4038

2 жыл бұрын

@@peNdantry you know our sun is rotating around Galaxy Earth will catch it back .

i love everything about your videos man, please keep up this amazing work of yours.

Wonderful video! Great job working towards inspiring openness towards new ideas. I've always try to enjoy new ideas that make you question your previous notions. Recently I've been mulling the idea that civilization is what's key to techno signatures but civilization is the thing that isn't persistent. Maybe there are multiple relatively intelligent problem solvers in our galaxy but few organize into societies which would elevate them to create techno signatures.

Level of production and script above almost every other channel. Keep it going Cool Worlds, you are doing it fantastic!!!

@CoolWorldsLab

2 жыл бұрын

🙌

I would insert a further parameter: the revolution inherent in the discovery. While the biosignature is considered by many to be an almost inevitable stage in the future conquests of humanity and would already represent a good cultural trauma for some of us, the technosignature would radically and forever change the very conception of humanity. It would be the ultimate revolution. A milestone in our history. So, let's shake this tree from the ground up, investing in the technosignature's research.

@CoolWorldsLab

2 жыл бұрын

Yes good point, the "reward" is higher with technosignatures so you've proved not only life but a specific type of life.

@benchasinghorizons9428

2 жыл бұрын

Their would surly be negative impacts on humanity at first, how would it effect religion? But your right it would be a complete revaluation.

@pseudophp

2 жыл бұрын

@@benchasinghorizons9428 That is true, it will have negative effects. However, religions should discuss it within themselves, seeing as many within each religion believe in extraterrestrial life in addition to their faith. Many of those 100% against aliens are boomer-age, so I think that too will get better when.. they pass.

@MrAcarlo

2 жыл бұрын

@@benchasinghorizons9428 yes, but if my cynical side prevails, I'm afraid that the discovery of biosignatures could be classified at the end as an easily predictable phenomena, boring an audience that is always hungry for novelty, for surprising news. While the discovery of technosignature would be more difficult to be forgotten whole and submerged by a thousand other daily news that try to amaze. Obviously my considerations are extremely reductive. I greatly respect the work of the intellectualis on this field. I'm just afraid of how this news would be treated by the media.

@FitzgeraldStanburyWeissV

2 жыл бұрын

@@MrAcarlo Yes, but anyone with any kind of ability to ignore the media will understand the benefits and not have the wool pulled over their eyes, so to speak. The media might convince people of untruths, or take the topic out of context, but many people are smart enough to not be fooled by it, especially if they're particularly interested in that subject.

It is always difficult when dealing with a sample size of one. We only have one sample of a life genesis and one sample of intelligent technologically capable life. So, I agree that given any decision we make to search for life is highly speculative at this point, so I think it is there is a sound rational argument to diversify our search as widely as possible . I was skeptical but you convinced me that some significant portion of our search for should include techno signatures.

Admittedly, have NEVER come across a dull ‘Cool Worlds” video! Nice job, Doc!👍🇺🇸

David, you and your podcast, Cool Worlds, are simply the best.

@BozoBear1

2 жыл бұрын

What podcast?

@lukeskydropper

2 жыл бұрын

Event horizon tho

@karlhans8304

2 жыл бұрын

he has a podcast?

@HimanshuKumar_24

2 жыл бұрын

Podcast??

@BozoBear1

2 жыл бұрын

I dont think he has. But he has appeared as guest on several. Event horizon among others.

These videos are truly beautiful. I just finished watching "How Big Is Our Universe?" And I am still in awe. Don't ever stop making these videos. 💯

@Laura-S196

2 жыл бұрын

To ensure that these high quality videos continue to be made, please consider donating to the Cool Worlds Lab (link is in the description).

I would add a fourth parameter: Loudness To detect, say, the excess oxygenation of a particular planet, we need to look directly at that planet, and we can only do this out to some fairly limited distance. Such limitations seem likely to hold for most biosignatures. But imagine if we were to see, say, a line of 100 supernova remnants, each explosion separated by perhaps 10 years of time and 5 (or 10, or 20) light-years of distance. Such a thing would be detectable many galaxies away, and would stand out to even the most casual of observing societies. A society may simply want to say, "I'm here", loudly and unmistakably. Or this might be done for war, or science, or art, or who knows why. But these will be visible in a way no biosignature could possibly match.

Your videos brings in me a form of serenity wrapped in contemplation, igniting imagination and curiosity. Thank you!

@user-jg2pb3io6l

Ай бұрын

Katy Perry what did we do to brother EM?

This episode is more like a documentary. Really good. Very interesting. True professional…..

This is one of the best thumbnails I've ever seen

@robc545

2 жыл бұрын

It’s from an old Aussie TAC ad. kzread.info/dash/bejne/YqZt15mLnpDUnZM.html

@captaindunsel2806

2 жыл бұрын

I agree! He just needs to get rid of that terrible goatee. Makes him look like a freak

@billtomson5791

2 жыл бұрын

I might soon look like that if I continue binging on ice cream like I have been since the lockdown began and after.

@hannahreese4735

2 жыл бұрын

Is this what the Couch Potato will evolve into?lol

@Outist

2 жыл бұрын

It's ugly

Wow, you've got this format nailed keep it up!

We should also have searches for Technosignatures especially one looking at our closest star systems. Technosignatures could essentially outlive their makers if any extinction event were to happen and would be a waymarker for us in the right direction to search for intelligent lifeforms.

I vote Bio-Signatures. More chance of finding something, although more ambiguous, to show for the funding and keeping the project alive. Techno-Signatures seems more of a long shot, although it shouldn't be ignored either.

@evilbetty9204

2 жыл бұрын

But wasnt Earth full of Carbon dioxide before the "Great Oxygenation"?

@slypperyfox

2 жыл бұрын

I wonder what upgrades to the current technosignature apparatus we have on earth (SETI) David would recommend. We have hundreds of radio and video telescopes set to detect all sorts of particles and gravitational changes but if there is something to detect they ain't detecting it. Sure, we've detected a few neutron stars dancing the tango and intercept (unintentionally) a comet or meteor every year or so but that ain't what we're looking for. I wonder what the class requirements were for those who have degrees in astrobiology. They show up as experts every so often on the Science channel. It wasn't offered when I went through college close to 45 years ago.

@slypperyfox

2 жыл бұрын

@@evilbetty9204 Of course. It was the substrate for photosynthesis. We had to learn the differences in the photosynthesis cycle and the Kreb's cycle (oxygen consumed and CO2 given off) human reaction. We live codependent on plant life and they depend on us - outside of the oxygen production that occurs elsewhere in nature. Note that oxygen is a poison AND giver of life in humans. Remember - it is an oxidative (destructive) chemical and the very basis of anti-oxidants sold for billions every year. An oxygen level of 50% was necessary to sustain the dinosaurs due to their massive size. The same atmospheric level would prevent humans and smaller mammals from developing/evolving. We do well with 21%. The athletes huffing and puffing with the oxygen masks are slowly damaging their lungs over time as those things deliver up to 50% to 90% oxygen. Oh, and at 17:10 great image of Jerrold Nadler.

I was intrigued by the argument that intelligence will "evolve" into the AI realm when in high school and I read "Profiles of the Future" by Arthur C. Clarke. I read this in 1964 and the book was already in paperback so it predates that. I suggest that searches for techno-signatures be life agnostic.

@andrewzanas9387

2 жыл бұрын

Life agnostic, meaning unrelated to how it came to be? Generally accepted as functional across all scientific disciplines, like mathematics?

@alphalunamare

2 жыл бұрын

AI harnessing renewable power would create a huge biological signature on a pristine planet. Why would it risk a technological signature?

@daviddean707

2 жыл бұрын

abccbc11 I too read this book but mistook the title as the myth that intelligence does not die but rather ever flows in the worldview of every intelligent being, a sort of curse of immortality, and am disappointed to see that I am wrong about its subject matter. Loved the book, though.

@andrewzanas9387

2 жыл бұрын

@@alphalunamare What it? Whose to say ' it" is a bio signature. It could be that a machine created AI was encoded long after all life ceased to exist, tasked to building a chain of planetary temporalities metaphorically speaking, barring of course the philosophical implausibilities for us of eternal servitude paying homage to some super narcissist of a god. We all have our own real life versions here on earth to keep us occupied in perpetual debate while we await to learn the various methods of our demise. Sorry, but sooner or later there will be a black hole super nova cosmic event that will expunge all life in our solar system. That is a given. As for the universe, odds are that will also have one jolly violent encore of a going away party. Hence, "it" is a moot point..

@alphalunamare

2 жыл бұрын

@@andrewzanas9387 Of course no one can say whether the glass is either half full or half empty. I err on the side of the I in AI being intelligent and able to learn from human mistakes. Other's might err on the side of original programming much like creationists do. I would think that any sensible AI at one with the planet and all its biosphere would be very careful about letting Earth's existance be known to extraterrestrial 'biological intelligence' given knowlege of the absolute carnage caused by such here.

Thank you for everything that you discussed! I’m always open to different thinking and some have opened different ways to think like a regroup way of thinking! Awesome educational channel!

I just got to this in October 2021; it was a great analysis of the debate about how best to find intelligent life elsewhere in the universe. The arguments put forward to indicate the need for money to fund more inquiry into techno-signatures was compelling. Thank you.

been watching for a few weeks and finally subscribed. I like the tone, theme and philosophical approach to the science topics you present. keep it up! :)

I think that a bio signature mission is a great first step in discovering life outside our solar system. It would give astronomers a place to look. From there, a techno signature mission could be developed to explore regions of space where bio signatures were detected.

@wilvrolijk5834

2 жыл бұрын

Great logic, then, remember the prolog of Arthur C Clarke "3001", we will never detect them !!

Loving watching back through the channel videos always have me thinking all day great work

The thing about listening to your voice is calming and soaking in to view of many idea's about the whole universe

it would be interesting to see a video on the pros and cons of each techno signature approach.

@THX..1138

2 жыл бұрын

I wouldn't be surprised if the most reliable techno signatures could also be detected by the instruments that would be used to detect Bio signatures.

@RyukyuStyle

2 жыл бұрын

paul van dyk is the best techno signature.

We should definitely follow both signature types, it's a no brainer in my mind. Everytime we add new ways of looking at our universe we learn more.

I love these videos even if they make my head hurt as I don’t always follow the maths, but I’m fascinated by the arguments of probability and ‘what ifs’. I find the creative use of data interesting and if it helps us visualise and understand the otherwise inexplicable, that’s the reason to watch these videos. We can make data say anything!

I love the visuals in this video. It really gives off a great atmosphere along with the rest of the video

I Get Professor Kipping On My Birthday❤️And a Day Off❤️Just Started Watching❤️🌏🙏🏻🔭✨

@CoolWorldsLab

2 жыл бұрын

Happy birthday!

@TuAFFalcon

2 жыл бұрын

Never did care about Birthdays myself. It's just another day... Not even metric! :)

@PafMedic

2 жыл бұрын

@@TuAFFalcon ,I Think It Cool I Was Born 10 Days After We Walked On The Lunar Surface,I Was In That Pic Michael Collins Took From The Orbiter ,Just On The Inside,lol

@PafMedic

2 жыл бұрын

@@CoolWorldsLab ,Thank You David,52 Today,and Get 2 Great Meteor Showers,My Own Birthday Fireworks Show,Havent Looked At It Yet,But Got a New Zwo385MC,It Shoots 108 Deg On The Tripod,Was a Decent Show Here In The S-SW Skies Around 0430,This Ole Lady Is Going To Finish Watching Your Show,and Her Slushie Jamaican Me Happy Drink😁❤️🙏🏻✨🔭🌏

@TuAFFalcon

2 жыл бұрын

@@PafMedic :) I was born 06/06 at 9am. So far I have been a good lad. No devil stuff.

Another great video. I think if we find intriguing signs of biosignatures, investment in searching for technosignatures won't be far behind. At our current level of technology, traveling to those systems is out of the question, so a strong biosignature detection would almost certainly spark interest in a follow-up attempt at technosignature detection.

As a new comer to you channel I really enjoy your videos. I would certainly say that yours if the best for content and the manor it's presented. I love how deep your material is.

Terrific video....I am a avid reader/viewer of everything regarding our universe....I also then viewed more of you're videos.....every one is so well developed and chock full of solid info. Keep them coming...you have a new friend. I wish I could live over again to witness our space processes & findings...hopefully I will know about it somehow.

This is very interesting. I have to admit, I was firmly in the biosignature camp before, since a technological civilisation would likely require biosignatures anyway. And even if no one else thinks alien plants and animals could be endlessly fascinating, I do. I'm a huge fan of speculative evolution works (it was cool to see you referencing Dougal Dixon's groundbreaking series, btw). However, you bring up a good point that technosignatures may be a lot longer-lasting than we (rather pessimistically) assume. Also, there could be technosignatures in places hostile to Earth-like biosignatures, if space-faring cilvisations have colonized places like, say, proto-planetary disks around young stars (a.k.a. mega-sized asteroid belts) purely for resources. It's a remote possibility, yes, but not impossible. I still think looking for biosignatures first is probably the best bet, but don't forget to look in the more unusual parts of the universe. You never know what you might find.

Yet again my favourite person saying something so interesting

@Voltaphonic

2 жыл бұрын

And he really knows that interesting something he's talk about

I’m not sure how I stumbled upon your channel but I’m glad I did, awesome content!

Thank you for making these beautiful videos

Thanks for creating this amazing series David! In response to your question as to whether or not there will be a greater longevity to our species, I do not have an optimistic view. Frank Fenner, who is renowned for the smallpox vaccine discovery, predicted that due to his great invention there would be a species collapse due to lack of resources. He likened our future to that of Easter Island . The Global Footprint project is a collaboration of scientists throughout the world dedicated to determining how quickly this Holocene extinction will take. They now have found that it takes an Earth and a half of resources to feed the people in this present day. It is no wonder that Arecibo never discovered a signal before it was dismantled. I’m on the side of finding some sort of biological signal and you hit it on the head when you mentioned oxygen as a the component for that discovery.

Tremendous content and delivery. This guy is obviously well educated and has a passion for his work. Thank goodness he has the humanity to share with us his knowledge and thoughts. We are all richer for listening. Have yourselves a splendid day everyone.

You have the PERFECT voice for what you do

Thanks for yet another great video. I think your arguments about potentially repeated emergence of intelligence were compelling.

I watch these in my free time, really helps relieve the boredom of the armys f'd up teaching system

@donkique956

2 жыл бұрын

Hooah!

@m.pearce3273

2 жыл бұрын

We won't have the technology to accomplish anything like this with the next Stone age looming. Yes there are people who will survive. But crawl back to what we take for granted now. Next to impossible. Watch the Disaster Series on KZreads Suspicious Observers. The intelligence behind this series is of your caliber of Science even of Astrophysics

@oksbpodcast7005

2 жыл бұрын

Getting my DD214 next week. Keep strong

@michaelmitchell4675

2 жыл бұрын

My two youngest sons are both in the Army now and I'm not impressed with the things I hear about training today. I was in the Air Force and served in Vietnam and our training was so DIFFERENT, we were trained to SUPPORT our country and combat the enemy, not so much today. Do your best to change the thinking from the new recruits, if possible.

@shady6427

2 жыл бұрын

@@michaelmitchell4675 it’s ridiculous these days. I’m training for cyber ops and they literally have no idea what their doing because they switched from the airforce joint training to an army training system cuz it’s cheaper.

And thank you very much for the work your doing giving people new ideas.

Thanks for sharing your knowledge .

A techno signature mission would be a great idea! Esp. once we start being able to resolve surface detail on rocky exoplanets. Personally I really hope intelligence stays around, at least long enough to set up a way to Von-Neuman seed the rest of the galaxy with life, even if it's just lichens, that'd be enough to kick off evolution on those planets.

@dannydetonator

2 жыл бұрын

Cool thought, just our tech is way below that level yet. To see the visual detail of planets, in pretty much any wavelegth would require a telescope with diameter surpassing that of the Earth. To see it in visible or infrared or ultraviolet light, it would take an eye bigger than the Solar system. It depends on the length of the waves collected, which renders the resolution far too low. Same reason we cannot discern molecules or atoms in the visible light microscopes. Of course, there is combining many distant telescopes, as we did to see that first black hole, which really was the closest and biggest available. Still, not much detail we could calculate out of all the data available from the telescopes capable of far shortest wavelegths than light across the Earth. For us now everything near other stars is far too far. Still, we won't give up. There is so much we need to explore in our back yard, before shooting for the stars. If i had children, i'd say my descendants hopefully will have a chance. Reason i stopped being anti-natalist.

I find it interesting that we assume that other technologically advanced societies would follow similar paths that we use. Using combustion engines and similar farming practices with similar societal structures. Using radio waves e.t.c. But even the differences in humanity's technologies between regions are pretty diverse. The big feature for support of progress seems to be infrastructure. Time for imagination and resources to implement our ideas. We needed mass production or mass dissemination of information as well. But different societal structures would certainly breed different paths and different ends. A lot of convergent and divergent evolution. I think we need to expand our vision of possibilities to really see what might be either in the future or from something alien. Aliens may fly by us and never see our radio signals because they never used them. They went a different route. Sure maybe they discovered them but they are but a footnote in a long forgotten history as many of our discoveries actually are as well.

@pizzadoctor7549

2 жыл бұрын

The good thing is that physics are universal; so more than likely any intelligent life coming about with the ability to see patterns and innovate tools from the perceptions will follow a similar path to humans in technology. Even other animals that create tools have a similar technological pattern as humans: apes making stone tools. It's quite unlikely that alien life will some how make vastly different technology that uses some unknown forces or methods. There are issues with the economics of the problems we have already solved. So that is to say, the economic issues of those problems would first have to be solved by alien intelligent life. Combustion as a method of preforming work is pretty primitive. Even crows can understand primitive hydraulics.

@oliver_siegel

2 жыл бұрын

Great comment! I totally agree, what if there's something that's still undiscovered that all the aliens are using? Just wanna let you and anyone who comes across this comment know that we're building a platform to "map" all these different possible paths, with a technology called enolve. Because if we don't have a map, how would we know where to begin looking for alternatives?

@goku546686

2 жыл бұрын

@@pizzadoctor7549 this assump is also based on the limited knowledge in physics that humans have grasped. The universe is beyond vast. But my guess. The time it takes civilization to form other civilizations have came and crumbled. Some galaxies further than we know as the light traveling from them still takes millions of years and are already beyond our reach. Never to be discovered as the universe grows in size and seems to accelerate as well. We could very well be faced with the fact that space exploration beyond the galaxy may prove to be impossible as by the time we develop the means of travel many galaxies could already be out of reach accelerating faster than we can catch up.

@KillerKegsey1

2 жыл бұрын

Imagine if they ate rocks, how much would that change their agriculture.

@knyghtryder3599

2 жыл бұрын

@@KillerKegsey1 This is actually more constrained than the tech/physics Life is not that divergent , which is why we see places on earth void of life , the interior of Antarctica or mountain tops You can't power much aside from a few bacteria strains with rocks Life has an incredibly tight range and requires extraordinary ecological balance We can see this on earth , no one animal can truly be stronger than the rest , or that is the only organism you would have left and then they would quickly go extinct because no one species is a perpetual energy machine. I will give you a fun example people often swim and boat in the sea and lakes for recreation. In the temperate zones this has a season , generally June through September in the northern hemisphere. But people get excited and they try to go earlier or later. A family were boating in the early summer /late spring before the water has warmed up they took their dog aboard on a four hour boat trip through open sea, due to the sound of the motor , nobody heard their dog fall in the water , the dog swam for days before being found by a fishing vessel and was reunited with it's family. In the same sea , a group of cold water swimmers went swimming in a group of 20 in the late summer early fall , when actually average water temperatures are near their highs , maybe a few degrees cooler , unfortunately the water was rough causing cold swells , and in under 10 minutes the group of expert swimmers in the cold water swim club were separated many couldn't reach the shore from only a few meters away and roughly 7 of the 20 or so cold water swimmers died , in under an hour. Sure humans have technology , humans study and practice swimming , sure humans have great communication , but even if you had dropped an Olympian into the middle of the sea in spring with the water at its coldest they wouldn't survive a few days , the dog did , with nothing , the dog likely didn't even know he was on a boat in the sea before falling. This plays into the divide between physicists and biologists neither one generally know enough about the others expertise to make good guesses and theories on extra terrestrials

Your videos are amazing and so insightful!

I always put him on when I can't sleep and listen to his majestic voice!!

We should build all of them asap. I want to know...

@Ron4885

2 жыл бұрын

I feel the same. I'd love to have this answer before I pass away. I'm not too old so it could happen. (I'm hoping)

It makes me kind of sad that I was born at the very beginning of technological advancement. What I would give to see and experience all the new things in the future

@aiwankhan85

2 жыл бұрын

We are already experiencing alot of stuff than our greatgrandfathers!!

@johannes7434

2 жыл бұрын

I guess this sentence always holds true.

2 hour drive back home while listening to David's videos. I can't think of a better way to spend my time..

Great presentation..why do I feel sad? Thanks for your valuable thoughts..

When Earth becomes uninhabitable, whether it is because of our actions or the sun's expansion, we have plenty of other places in our solar system we could survive in. If humans set up colonies on every viable icy rock like Mars, Ceres, Ganymede, Enceladus, Europa, Pluto, etc. we could continue to emit technosignatures for billions of years after Earth has stopped giving off biosignatures.

@Vasharan

2 жыл бұрын

I think that terraforming (or even dome habitation) is a lot more difficult than a lot of science fiction makes it out to be, especially for long term habitation and colonization. It's not just creating livable atmospheric conditions and radiation shielding, creating healthy micro-biomes and sustainable plant and animal ecosystems will be very challenging. The Expanse makes a nod to this with its colony collapse subplot that directly alludes to how fragile artificial ecosystems can be, and this can be the death knell for a space or extra-terrestrial human outpost.

@grimjowjaggerjak

2 жыл бұрын

@@Vasharan We have billion of years to figure that out tho. Plus you don't even need to colonize a planet we could just build space habitats

@dav9104

2 жыл бұрын

@@Vasharan Vast majority of people will live on rotating space habitats. Having a planet being used as a place to live is a waste of resources. Better to use that planet to build space stations.

@dav9104

2 жыл бұрын

This was the thing I was thinking of the whole segment and was hoping he would mention something. Planetary chauvinism is real in this one.

@Vasharan

2 жыл бұрын

@@grimjowjaggerjak The problems don't go away in space habitats. If you are going to grow food or use plants to produce oxygen, you still end up with fragile ecosystems that can collapse because we neglected a key element (rhizomal bacteria, fungal commensals, pollinators, pest eaters etc.). And even then, humans rely a lot on gut and commensal bacteria that help us digest our food, absorb nutrients and vitamins, ward off infections, keep our immune system sufficiently occupied) etc. Island populations of humans on O'Neill cylinders will also start to diverge from each other until contact can become fatal to either the humans (cf smallpox vs the Aztecs and Native Americans, Spanish Flu, Corona, etc)or the plant and animal ecosystems (cf Dutch Elm, Rinderpest in wildebeest and cattle, Myxomatosis in rabbits, facial tumors in Tasmanian devils, etc). And that's not even going into how much harder it is to keep a small closed system going with recycled air, water, minerals vs losses to space and thermodynamic limits.

It’s a rainy Monday morning and I’m on my way to work… but this video has strangely given me a lot of hope ❤

I very much appreciated your presentation. Thank you

Thanks for the informative video. I had a question: you make the case that techno-signatures could persist for a long time because intelligence itself persists. Isn't it also possible that techno-signatures could persist for a long time after the civilisation had died out? Of course there is the question of the time for the signal to travel... though I guess it only comes past someone sitting somewhere else in the Universe once. But in addition, surely it's not impossible to imagine that now already we ourselves, at our own level of technology, could have transmission devices set up independent of the survival of our own civilisation, or life on this planet? Instruments in space capable of broadcasting indefinitely using nuclear or solar? If that's the case then it further weakens the case for concentrating solely on biosignatures.

lets watch out for bio signatures first and when we have found some, we can still add another few technosignature searching devices.

@michaelmitchell4675

2 жыл бұрын

I think biosignatures are important, but given how you might find a substance indication life doesn't mean life is there. Technosignatures would probably mean advanced life is there, how advanced would still have to be determined.

@obiwankenobi1608

2 жыл бұрын

@@michaelmitchell4675 Or it could mean they are gone from that world

@andrewzanas9387

2 жыл бұрын

@@michaelmitchell4675 We have already discovered an outlier to our evolutionary tree of life, an arsenic based lifeform that lives in the volcanic vents rising from the sea floor.

It seems there was lots of time, effort and knowledge dumped into this video. I think it should have way more likes, definitely underrated.

These videos are great for many reasons but especially because they are communicated so the average person can understand .

As usual, a very interesting video; I personally have moved to thinking that intelligence is rare, but even very rare, say 1 in 100 000 planets having an intelligent species still means an enormous number out there. Now is an extremely exciting time to live in!

@davidbrisbane7206

2 жыл бұрын

If you further assume that only 1/10 of the intelligent life is smart enough to have a space program and that only 1/5 of them are interested in colonising the galaxy, then that's 1/5,000,000 civiliations that wants to colonise space. So, a few hundred civil ations in the galaxy and maybe only a handful of them in our part of the galaxy. Maybe 80% of them are already extinct. So, we are down to just one or two active colonising civiliations in our part of the universe.

@michaelslattery513

2 жыл бұрын

Your math leaves out a too many variables I would suggest at a minimum starting with the basic variables in the Drake Equation and even that may be too simple. In the Drake Equation all you need is for one of those variables to be zero or 1 for the result to be we are the only intelligent life in the universe. So, while at a quick glance the huge numbers makes that seem like a egocentric and ridiculous conclusion, when you proceed step by step through the Drake Equation variables all you need is one of those variables toward the end to be "the great filter". One variable that is a 0 or 1 in that equation which gives you the result that we are alone, and thus far, it is what our observations confirm. I hope we are not alone because if we are, what a tremendous responsibility we have.

Great video and always love the info! However, based on human history all civilizations comes to an end for some reason. Maybe we can learn how to prevent that instead of letting it repeat itself, but looking at the world today, I can only assume at some point this civilization of ours will fall too.

@mechasaure9801

2 жыл бұрын

but another will emerge

@madzangels

2 жыл бұрын

USA was a good idea that got out of hand, it will fall inevitably and be replaced by something better - seems to be the general pattern of history

newly subscribed, i must say from all the science-related channels I find this one above all, everything is perfect nuff said

Awesome video, awesome subject!!! Finally, something worth watching, and wonderful that input is requested. Yes, investment into technosignature tech IS, in my opinion, paramount. If we are going to search for intelligent life, we MUST throw at the problem resources, ideas. But, the science community as a whole must stop being so naive, so narrow-minded, in their thinking as to how to approach this issue. All ideas should be given consideration. Only then will really great approaches be fleshed out.

Thanks for this video; my question is, can they detect if other planets have a form of carbon capture? Would this be biological or technological?

Imagine a day where our telescopes become good enough to spot Dyson swarms in other solar systems.

@FaceFcuk

2 жыл бұрын

James Webb telescope that will launch in a few months will be able to see the beginning of time and will be able to see if life is on other planets. It is 5 times bigger than hubble with massive mirrors.

@strygwyr5735

2 жыл бұрын

@@FaceFcuk naaah.. it's a lot better but i don't think it can see any further as far as you've expected. Anything that went past the horizon of the observable universe won't be able to out run the expansion of the universe. Anything beyond there won't be detected unless we Scifi technology

This Guy is Amazing, hand's down my favorite Channel!

Great lecture. Appreciated.

Professor , I highly appreciate the existence of this KZread channel of yours . However my answer of your asked question in the end is : No we shouldn't only be bound to only one space expedition mission option . It must be both bio and intelligence based mission . Best regards : 🇵🇰

I'm not sure I want to discover an exoplanet technosignature that's persisted for more than a million years. They probably wouldn't even recognise us as being intelligent. Oh the irony.

you explain everything so clear i love your channel

I've Always enjoy your videos... Thank you

Bio signature would probably be better but having said that if we merge with Ai or even become extinct, Ai could most definitely out live us. And for all the billions of planets that are a lot older then us, we might be better chasing the tecnosignatures in my opinion.

@alanbrady420

2 жыл бұрын

@Fire Ant Powersports it could be possible I can imagine.

@Akapaco2

2 жыл бұрын

@Fire Ant Powersports Why would you ever need a Generation ship to last thousand Generations? We won't even attempt manned-Interstellar travel until we have at least fusion-powered ships capable of achieving something like 10% the speed of light. At those speeds, travel to the nearest Stars should only take between several decades and a few centuries. It's also possible that with medical advances, humans may live much longer in the future.

@Akapaco2

2 жыл бұрын

@Fire Ant Powersports So at 1g of acceleration, it would only take about 35 days to reach 10% light speed. Building a large spacecraft that could withstand 1G of acceleration does not require any exotic materials. The ship would not break apart during acceleration. The ship would only have to accelerate for 35 days and then just coast for the remainder of the trip. Once it nears its destination the ship would simply rotate so its engines were in the opposite direction to decelerate for 35 days to stop. As far as a power source, Fusion should be sufficient to provide enough energy for the acceleration and deceleration of the ship. The biggest challenge however is radiating all the heat generated during acceleration. The ship could have large drones with sensors sent several light seconds ahead of it to serve as a early warning system for larger Interstellar debris. Interstellar dust is a danger, especially over a long periods of time, but can be mitigated. The ship could be placed inside an asteroid, providing the occupants with protection, as well as addtional resources for ship repairs. The ship could also be designed like a mushroom, with a large water-filled shell to serve as a shield. Human life spans have been extending ever since the Industrial Revolution, and there's no reason to think that this will stop. A Future Humanity that has colonized the solar system would have access to exponentially more resources. Presumably the majority of future humanity would have access to proper nutrition as well as more advanced medical and psychological care. This is also ignoring the possibility of genetic engineering becoming widespread and further eliminating most diseases. As far as AI raising human embryos, we don't even know if that could work. So much of early childhood development revolves around young children interacting with their peers as well as observing adults in society. We simply don't know how children would react to being raised without interaction from our larger society as a whole.

@Akapaco2

2 жыл бұрын

@Fire Ant Powersports You did bring up some really good points!

@Akapaco2

2 жыл бұрын

@Fire Ant Powersports No worries! I don't think you were preachy at all. I tend to be overly optimistic when it comes to space lol. But who knows, we might be able to have a cool sci fi space opera in our own solar system some day in real life.

I hope the JW telescope is able to detect planets with life, and detects it. We would go from detecting the first exoplants to detecting the first 'exolife' in just a few decades.

@CoolWorldsLab

2 жыл бұрын

That would make us the luckiest generation I think to see such a transformation in knowledge

@transformlikeaphoenix

2 жыл бұрын

Perhaps JWs successor can do this. By that point something like Starship will transport a device that big.

@thomaswaldeier2073

2 жыл бұрын

Detect detect detect detect

Wonderful and thoughtful content, as always. I come away from "Cool Worlds" videos feeling my mind has opened and I often find myself brainstorming. One thought that I have about the "technosignatures vs. biosignatures argument is that once a species (singular or plural) is able to control its own survival, environment, and energy sources, that this could, indeed, portend that they will survive indefinitely into the future. (Like in "Contact", Dr. Arroway would ask an extraterrestrial, "How did you do it...survive your technological adolescence?") We have already lived 75 years after the invention of the atom bomb...and we're still here. I find that encouraging. (And although I don't always agree with him, Steven Pinker's book, "Enlightenment Now" makes the argument that life on Earth - through science - has vastly improved for humans, not just for an elite few, but nearly every population, and is trending to get even better.

@michaelslattery513

2 жыл бұрын

Well said, I would add the estimated time frame for a technological species just slightly ahead of our own could populate our entire galaxy with self replicating robots in approximately 100 million years, which is not that long at all.

Amazing video!!!!!!! Thanks for such great explanations! Just one thing I would add: Every time we reference life outside earth it would be interesting to say always "life as we know it". Even when we talk about tech or biosignatures. We should consider this expression. Just because What we know can not be a strong or guaranteed parameter for the unknown. So when looking out there we should be looking for the known the same way we search for the unknown.

The industrial revolution was based on wood, then coal. Oil is relatively later to the game.

@digitalfootballer9032

2 жыл бұрын

Yes. And as a side note, many have debunked the peak oil estimates, some of which have said we are currently at peak oil production. Many of those models came out before many of the newer extraction technologies existed. Some believe now we have many hundreds of more years at the same or greater production rates we are at now, which should be well enough time for newer, cleaner technologies to take hold. The concern was always that we would run out of oil before its replacement was perfected. Newer models show otherwise, and I have to agree, as the progression of alternative energy sources has really ramped up of recent. This combined with a larger "window" for going about the old way should see us through just fine to the next great method of energy production.

I definitely think intelligence is likely to be persistent, though the exact amount of intelligence in a species or a biosphere may vary up and down a fair bit due to natural selection. Realistically, human technological civilisation is likely to more or less persist too, with occasional step-change collapses, but no return to the stone age.

Thanks a lot for talking about this subject. :-) Its very fascinating, also from a very mundane standpoint, that biosignature research is still more funded than technosignatures. In the end you talked about some of these projects, as the excess heat detector, which I think sounds promising. I am just curious about the fact, that we did not have found huge technosignatures so far. We have been scanning thousands of galaxies and if indeed galaxy faring civilizations exist, why are we unable to see them? It just baffles me, because it reincites the question of how civilizations come to emerge and actually persist. I will gladly watch more about this subject from your channel. Thanks again.

Thank you for the insight.

I have always maintained a shotgun approach is best. Both bio and techno searches are viable. Do both.

@l1mbo69

2 жыл бұрын

Ok give them 20 Billion funding instead of 10 billion then

@carso1500

2 жыл бұрын

@@l1mbo69 or give them 10 billion but use start thinking on ways in which you could integrate starship and the step price drop into the design, by design a single 10 billion satelite if you can instead design one hundred 100 million dollar satelites that accomplish the same or even more and launch them in 100 starship launches