A Natural History of Mars
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- čas přidán 8. 05. 2023
- Check out Journey to the Microcosmos: / microcosmos
While Earth’s natural history has been playing out over the last few billion years, another epic planetary saga has also been unfolding right next door.
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The idea of life happening TWICE in a single solar system is incredibly exciting, even if the time wasn't right to both live at the same time
Or 3 times, if the theories are correct if Europa having an entire ocean biosphere under its glaciers
@@lochness5524 don't forget titan and guyamede
Awww both could have lived at the same time. Just not space faring civilisations but Microbes on both planets for sure why not
Don't forget Venus
Or once. Life doesn't necessarily have to originate from the planet it lives on. Keyword: Panspermia.
"We've only just recently begun to figure out some answers, thanks in large part to our curiosity and perseverance." I see what you did there. 😉
I'm glad I wasn't the only one. 😂
The writing for this episode is so fun.
yupp!
took a minute for it to hit me
@@Sanyu-Tumusiime Careful! Don't let the Mars rovers hit you. They're pretty solid. 🤣
As a planetary scientist and long-time Eons fan, I cannot tell you how excited I am to see this episode 🤩 Thank you!!!!
Same, and same! :D
As a biology professor and vivid stamp collector I must admit that there wasn't really anything new to me in this video.
It was my understanding that Mars lost its magnetic field because it lacks a large orbiting satellite like the Moon here on Earth. Isn't the Moon's gravitational pull on the Earth the reason why Earth still has a rotating, hot semi-fluid core?
@@nilssonakerlund2852no. The moon just stabilizes Earth. Without it the earth would tilt slightly and messing up the weather and seasons. Mars has no real atmosphere because its too Small to hold one and no magnetic field, because of a Small solid core, to protect it.
@jf6285 what kind of stamps are you collecting?
7:03 Small detail. The Sun close to the martian horizon, as depicted here, looks blue, not yellow as it does on Earth. That's because of the different atmosphere and types of dust particles suspended in that atmosphere that scatters red light more efficiently on Mars. It's also why the martian sky usually has a definite salmon pink color to it.
lmao evil earth be like: red skies, blue sun
So as it reach twilight it slowly gets bluer and bluer? Sounds amazing.
yes, that dust is probably pain in the .ss, imagine, planet being dry for so long, with winds keep eroding the place, regolith getting more and more refined, basically became a part of atmosphere lol
@francoislacombe9071 - When I watched NOVA "The Planets: Mars" yesterday, they showed the aurora borealis on Earth as its usual predominate green, but on Mars as blue. Similar reason, do you think?
@@MossyMozart Probably, different gases, different colors.
It always blows my mind how Mars doesn't have water anymore, yet it is the primary source of Mars candy bars. The universe is a mysterious and magical place 🥰
They Will say, "Its not magical, Its scientifical!" 😂
What bothers me is that you can go to a store and buy Moon Pies, but if you go to the Moon... NO PIES WHATSOEVER!!!
@@grokeffer6226 Well, all were sold to stores on Earth, not enough money in selling them on the moon as even with sharp discounts, just nobody shows up in the factory store 😢
@@grokeffer6226 🤣🤣🤣
@@grokeffer6226 Last time I was on the moon they had moon pies.
There is a theory floating around that we actually did find not just evidence of life but actual living microbes on Mars during the Viking Lander missions, and we accidentally killed it. The basics of it is this one scientist had the thought that its possible martian life adapted to metabolize hydrogen peroxide, and the viking soil samples did show the evidence that that couldve been the case but since the way the soil was being analyzed was to get heated in pure water that scientist asserts that we actually accidentally killed the possible life in that soil sample.
Wouldn't they see dead life in the soil then?
Bro they found lemmings on Mars 😉
@@amc1140 I think that he means the mechanism to analyze entirely destroyed the life inside the sample-- so its just gone
Am I the only one who is always on the verge of tears learning about space?
Like its so amazingly overwhelming and wonderful how huge this universe is and how small we really are... and how science has shown us so much truth to our place as a sentient species capable of understanding what we are seeing.
Yes... But shows like this always fill me with a certain amount of dread. :/ Like, what would happen if OUR magnetosphere suddenly stopped working tomorrow? Or if a gamma ray burst (mostly emitted by pulsars) suddenly came out of deep space and wiped out all life on Earth? The chances of it happening are incredibly small, but it could happen!
@@Zaxares "What would happen..."
You already answered that. 😂
We would die out. There'd be no escape. There's literally no point in worrying about it.
@@Zaxares To somewhat ease your worries, they did explain why that wouldn’t happen anytime soon in the video. In answer to the base comment, yes, I feel the same way about space as I imagine you do.
I think that as an intelligent, but not wise species we have become a part of the universe that has become aware of its existence. As Carl Sagan said "We are a way the universe has got to know itself". Therefore we are the consciousness of the universe and while we are small in size, we are very significant and what a loss of universal progress it would be if we destroyed our selves with that lack of wisdom and the intelligence to make it happen with our technology. Smart as we are, we have a long way to go to mature as a species and this century is the most dangerous as we develop the qualities of a level one civilisation.
Nobody is truly unique so to answer your question, no.
fun fact: using the words opportunity and insight to describe what machines allow us to do on Mars means more than meets the eye. In addition to the well publicized rover Opportunity, a piece if seismographic equipment put on Mars, a distinct mission from Opportunity, was called Insight
She makes a sneaky reference to Curiosity and Perseverance earlier in the vid too.
Rover puns are the best puns
@Chris Watt - I have liked all the names of the Mars exploration craft. They were well-chosen.
@MossyMozart same. especially Insight and Ingenuity, in that order. All the names fit well, but those two in particular are intriguing and accurate words for the rover they are assigned to. I am really looking forward to the Mars sample return missions.
I’ve always been fascinated by Mars, I really hope Perseverance can find ancient microbial life so we know we’re not alone. 👽
I’d rather scoop up some extremophiles from a methane puddle on Titan
I'd rather colonize and terraform Mars, but I'm not willing to say out loud that I hope we don't discover life on Mars for fear of that discovery preventing colonization. 😅
@@Whatisthisstupidfinghandle i want giant monsters on europa
Taking the Great Filter Theory into consideration, I would rather not.
we are alone
Wow. I had no idea how the possibility of actual life on another planet would affect me till now. It's both beautiful and, in the event that it may have died out eons ago, incredibly bittersweet. I almost wanna cry.
Yes, agreed.
her delivery was so impactful as well; I love Blake's hosting style!
Close in space but separated by time. Assuming mars wasn't always dead
"...thanks in large part to our Curiosity and Perseverance..."
We see what you did there...
Your videos are always A+. But, I'll give you an A++ for mentioning so many of the rovers. Haha
Yessss, I loved the cute little references
P.S. these shows have been so lovely, for years. It is my hope shows like Eons receive funding for years more to come. You all teach in a delightful way.
Recent study based on observing marsquakes and seismic waves suggests that the outer core of Mars consists elements such as sulfur, oxygen, carbon and hydrogen but few iron. And its inner iron core is probably smaller than expected.
just adds onto the theory that its iron core probably just cooled down too quickly removing that protective field
Interesting that Mars has quakes given that it, to my knowledge, doesn't have plate tectonics.
@@ericbrown1101 Well you are partly correct. Most earthquakes do come from tectonical activities but they are not the only source. First of all, Mars does have plate tectonics but they are now relatively inactive compared to its past. Secondly, as long as the core is still running it can have planetquakes which is the sudden release of energy from the interior, such as through volcanos, which Mars also have.
@Luca damn those names bring back memories of researching for my thesis lol
@@JubioHDX So what sort of timeline does that give us, relatively speaking? Is there a prediction out there for the end of Earth's magnetic field? Another billion years or so.....?
All the puns about the rovers etc were Terra-ble! I loved them.
Earth also has two planets worth of cores, so it's bound to be larger and last much longer than Mars. The glancing impact of Theia with the protoEarth that resulted in the Moon also combined both cores in the resulting Earth. That one event was so important for us to be here.
Wow that's true. Yet so many people don't even know such a collision happened
@@Greatblakhooshthe moon also affects the earth crust, keeping it geologically active with its gravity.
Much like Jupiter and Saturn make their moons geologically active too.
I was just thinking about the theia impact and how that would effect our magnetoaphere compared to Mars after today's scishow video on it. Having a large moon also helps a ton. This could impact the drake equation if not enough planets have large moons or cores to sustain a magnetosphere long term
There is an interesting possibility that terrestrial and Martian life are related. With the Late Heavy Bombardment, or earlier, our planets could exchange pieces of each other with microbes to travel on.
Most likely it would of been some hardy microbes or spores, not any complex life, but if we ever find any and they have DNA, same or very similar, it would be very significant evidence proving that theory!
Somebody, I forget who, did a video saying the Late Heavy Bombardment likely never happened.
@@keithfaulkner6319 But anyway, we have at least one Martian meteorite from Antarctica, as far as I know, so possibility exists
@@andrewmichaelson70 a huge meteor on Mars could have sent it here, as a one-sie.
In grad school I took a statistical dive into evidence of early life on Earth and how long it would have taken to arise after sterilizing events. It's potentially VERY short. It made me realize that it's quite possible life cropped up on Earth more than once, and then got snuff out only to arise again. Long story short--it's possible life on Mars originated on Earth, but could have even originated separately from the current life on Earth.
Or you know, maybe we're all actually Martians anyway.
Anyone ever wonder what the first lifeform to contemplate the stars from Earth was?
Humans
lots of birds navigate by stars at night for migrations. i'd bet the smartest dinosaurs, like troodonts could totally recognize stars as at least something
It was Jeff
@@AlfonsoCejudo Yeah, Jeff told me it was him.
@thingonathinginathing - One of our hominid ancestors, sitting around that new-fangled invention, the campfire, and gazing upwards.
I am soooo excited for this episode!!! But it'd be awesome if you could cover Venus next!
I think there is less to tell about Venus as we simply haven't studied it as much. Mars has had multiple satellites, landers, and rovers deployed there. There hasn't been the same done to Venus.
Oh absolutely. Valiant Thor would appreciate that 🖖🏽
The problem with the Venus is the temperature of the place, Its so damn hot. Curiosity or Perseverance would melt instantly if they put into Venus.
Wasn't expecting this channel to tread into PBS Space Time's territory, but I'm not complaining. I can never get enough space stuff. I'd love if you did a whole video like this on Venus too.
though side note, the "Mars's core cooled because it's small" hypothesis has been definitively debunked by the Insight lander, which used seismic data to determine that Mars's core is most definitely still hot and molten. It is also more diffuse than Earth's however, meaning there might be a lot of non-metals like sulfur mixed in with the iron, hindering its ability to conduct electricity and generate a magnetic field.
One could say that the reason the Martian core has become more diffuse is because it’s smaller; i.e., the planet formed further out and had fewer resources to feed its growth. Theory un-debunked?
@@callistoancrater1582 And yet there is clear evidence that Mars DID once have a magnetic field, meaning when it formed the core was somehow more differentiated than it is now, which is a bit of a puzzler. More data is needed.
@@AceSpadeThePikachu Agreed.
damn i thought you two would start fighting but yall are chill what the heck
@@litheralySOcool Amazing how much more can be learned from civilized discourse than partisan politics, eh?
My guess is if mars ever had life, it almost certainly still does. Now it might be purely microbial and kilometers below the surface, but I'd bet anything that something would remain.
I believe the same thing. The earth itself has anaerobic bacteria kilometers under under the crust doing just fine.if I remember correctly its chemosynthetic and only reproduces every 1000 years, but it's still life. I don't know which would be more amazing, an extra terrestrial organism with DNA that matches ours or one with a different coding system altogether.
the idea that there was once life on another planet nearby, but that we missed the chance to contact it, is so much sadder than the idea there's no other life in our solar system
I mean luckily no one thinks there was ever sentient life to contact. So even if it still exists or we aligned the time periods, we couldn't contact microbial life. Just thought I would throw that out there. I agree with you, it's still really sad. But there would have been nothing to contact in the first place.
Though if there ever was life on mars, it means basically one of two things:
1) either Mars or Earth seeded life to the other
or
2) life evolved independently in the only two planets we’ve been able to closely observe, which probably tells us that life isn’t too uncommon in the universe.
The life that was on Mars at one time was so long ago we wasn’t able to contact anything and if we did what would we be contacting “ them” with??
And what exactly was we to contact?
I recently learned about the Chromosome 2 Fusion event that resulted in humans having 46 instead of 48 chromosomes. I would love to learn more about it on a PBS Eons episode!
The scary thing I picked up from this is that, theoretically, Earth could lose its magnetosphere at some stage in the same way as Mars but it will take longer because of the planets size.
Much much longer. Earth is the densest planet in the solar system and our core is pretty massive for the small size of our world. It's going to be eons before it begins cooling off, so hopefully we are already spreading out into the stars by then!
@@snaffu1 Mercury is the most dense planet.
@@RideAcrossTheRiverquick google would show Earth is the densest, slim margin difference tho
@@amy2089 The list here shows Mercury.
@@RideAcrossTheRiver Literally every site I've checked shows Earth with an average density of 5.52 grams per cubic centimeter and Mercury at 5.4 grams.
The puns throughout this video were fantastic!
Roughly translated for any Martians. Ack Ack Ack Ack Ack, Ack Ack Ack.
🎶 *Yodles*
🍩🙋
💀
I loved the video, but you could've done a Space Time-Eons crossover episode with this topic! Maybe an actual one could happen in the future? It'd make my day.
TBH, I thought it was a Spacetime or Astrum video when it appeared in my subscription feed. Why Eons do astronomy now?!
@@PainterVierax because sometimes astronomy and paleontology overlap when it comes to searching for remnants of life on other celestial bodies🤷🏽♂ agreed that one of the space time hosts making an appearance wouldve been a fun crossover though
@@JubioHDX yeah exogeology and exobiology are things but this episode comes here without any previous interest on Curiosity, Perseverance or any other space mission searching for life signs occuring before or during the creation of the show and this episode doesn't contain any paleontology either.
@@PainterVierax Quite simply because the science behind the search for life on Mars has a heck of alot more to do with geology, paleontology, and biology than astrophysics. In way, it's the ultimate test of what we think we know in those fields, and paves the way towards better understanding of our own planet.
@@patreekotime4578 again, it doesn't make sense to suddenly decide to talk about scientific mission searching life outside Earth when there is no breakthrough since years. This episode seems out of place, like they clumsily decided to expand their editorial line or make a filler episode.
Nice word play. Kudos to the script writer. 👍
5:45 Imagine all the different science disciplines that had to collaborate to be able to figure out how old a Martian rock was!
@tillettman - And to even find one in the Artic!
Trip to Mars to truly get a breath of fresh air away from Earth's GTA parody world does sound like an experience of a lifetime
All the beauty of the world will also disappear. There are two sides of every coin Mr Heisenberg.
Okay.
What
you could just go to the Sahara, it’s infinitely cheaper and safer
Somehow I doubt that you'd be breathing fresh air on Mars.
"Thanks in large part to our curiosity and perseverance" is the best double meaning I've heard recently. :)
I went to Vegas for two weeks no social media no news no nothing and now I get all these refreshing videos I’m just drowning in happiness tonight
"It's life, Jim--but not as we know it."
Loved the shoutout to the rovers Curiousity and Perseverance and Opportunity, as well as the lander Insight!
One of the best episodes you have ever made
I love how much fun y'all had with the script for this one
Rarely does a video make me go WOW. Thank you for all your hard work.
This was not only a fabulous video with exciting information, but the information that the rover was atacking up rocks, for a later visit by robotic passengers to retreive them and deliver them back to earth, is ground breaking! This could mean the whole difference as to answering those questions! And with a large enough assortment of rocks, we could answer all kinds of questions that we have had for years asked! This is fabuloues news! And i just hopethat the second part of this plan comes to fruition before those that wanted to complete this second and vital step of the plan, ever gets finished! I know with covid and wars and regime changes and money issues, all things can end up going by the wayside long before thet retriever robot even starts to get built, and then we still have to get it to mars and hime again with its delicate cargo. And we are so many years from that happening still, just because that was an original plan, doesnt mean that it will come to pass. But i certainly pray it does. If not in my daughters lifetime, but my granddaughters lifetime then. And i hope someone is still around to care about this nission and is smart enough to be able to work with these samples and be able to do something other than just look at them and make poor determinations again! I wish i could ve here to see the pkans results, but at 58 years old, i wont live to see that happen. I hope i can get my daughter to care enough about it to keep the dream alive! Its not only curiostlity, but may hold information that is vital to this planets survival eventually! This is wxciting news though! Thank you!
Sadly, there are already questions about the funding for the return mission. It really depends on the state of the US economy and the willingness of every single President from now till then to continue funding for it.
Fortunately, if SpaceX's Starship comes anywhere even remotely close to its design goals, we'll get to Mars sooner rather than later, within the lifetimes of most humans currently alive.
I just turned 21 and am super interested in this too. Will definitely want to encourage my future kids to do this too!
Powerful episode that should be seen by everyone on earth
I love PBS Eons so much! You guys make such amazing and videos. Thanks to this channel, I've built up an interest in paleontology. Please keep making more videos. 😊
i always wondered about it, thanks a lot for making this video
This has become one of my favorite channels
This is already my favorite channel, and this episode made me fall in love with it again.
Would love to see an episode on sea snakes, love the work y’all do!!
There is no evidence that life exists anywhere in the Universe except for here on Earth. I hope we do find it someday. But for now, Earth is it. Earth is amazing. Please, let's take care of it.
I recall reading that Mars' early atmosphere was twice as dense as Earth's--meaning it might have had a fizzy, carbonated ocean!
Can you imagine how many new questions will we have is they ever find microbes on mars that are proved to not be contamination? If they turn out to be somehow related to life on earth or something completely different altogether won't even matter! Both are equally mindblowing to me. And the implications this would have for fermi's question....
Could Mars' current condition be related to the idea of The Great Filter?
@Pol Blanes - it would be enormously exciting - we would have neighbors!
@@iqbaalannaafi761 well I don't know but in would give us some insight on possible solutions to Fermi's paradox for sure :)
Is it possible that the tidal forces the moon imposes on us squishes Earth's insides up enough to keep our core hot, thereby keeping our magnetic field active? If Mars had had a massive moon creating tidal forces could its insides still be hot, and still have a protective magnetosphere?
Tidal forces are why Jupiter's moon, Io has lots of active volcanoes. But it's also really tiny. Earth is simply too big for the moon to affect it that much at reasonable distances. It's an issue of scale. It's why big animals have an easier time keeping warm, while small ones have to have humming bird metabolisms just to not freeze in cool weather.
@@patrickmccurry1563 So, since Mars is so small maybe we could build (LOL) a big enough moon for it and in the next million years the tidal forces will melt its insides and give it a dynamo? (Obviously not, but it's a fun thought.) 😁
Consider that Earth may also have a second core as well. It’s been theorized that our core was essentially supercharged when we collided with a mars sized planet which would have combined the two cores.
@@threecatsdancing Move Ceres to orbit Mars? Anything is possible given enough tech and time.
It's the size. Mars doesn't have the mass to exert enough pressure to keep things nice and melted.
2 months since the last upload, don’t tell me the best channel on CZcams is going to stop uploading :(((
Their community is still active
Absolutely in the Top five best channels on CZcams!
The remains of any type of life on Mars is something I would like to know before I die. We would be lucky enough to live in a solar system with two habitable planets, cementing the notion that there's life farther out there.
Thanks PBS eons for making awesome content and also puns.
Gosh it’s been 2 months now. Is there any reason to we haven’t got a new upload? I miss pbs eons
Where are y'all ?
Liked how you worked all the rover names into the narration. Funny.
The surface and environments on Earth are pound for pound the most interesting amd varied by far. The tectonic plate activity, the vegetation
Props to the cameraman for choosing to birth millions of years ago and already going to Mars to video what happened, and also experiencing millions of years.
"Thanks to our Curiosity and Perseverance."
I see what you did there! 😂
She had a good Opportunity to insert that in.😂
I think it's great that you guys are venturing off Earth! 👌
Thank You I love PBS Eons . Fascinating.
Het eons could you do similar videos on life beyond earth? Astrobiology anyone?
i think they need like… evidence. This isn’t the history channel ancient aliens
I was wondering why you guys haven't appeared in my feed, turns out y'all are on hiatus?
i love pbs eons so much! brings so much thought! such a carefully & informative video! ♥️
Nice topic and change of pace. Very interesting information and questions. 🙂👍🌌
It must have taken eons to work all of those puns into the script.
Why did you stop making full-length videos ?
1:22 "curiosity and perseverance" nice reference! (it's the name of martian rovers shown on screen)
Those little weekly updates about the planet and rovers on the Mars Guy channel sure are fun.
Imagine a whole subterranean ecosystem underneath Mars' surface...
Been a few months… Earth has only been around 4-billion-ish years… did we run out of things to talk about?
It was born too small, couldn't catch up, and got left behind. That's what happened to it. But... Awesome JP callback, LOL!
Thanks, Eons & PBS, for all you do!
SO much better than mainstream TV ...thank you !
I honestly can’t believe it’s been two months since eon’s last upload😢
Why did this channel stop?
Probably just a long break. They still upload shorts
I like the hypothesis that life is a natural consequence of chemical activity on developing planets, which suggests that life may be very common in the universe and takes root wherever there is a remotely "just right" combination of water and thermal activity, etc.
I love the Jurassic park reference. Life indeed does find a way
00:01:23 Anyone else loved the dubble meaning of Curiosity and Perseverance?
@Laura van Santen - Also, their double meanings. So punny.
I wasn't reddy for those!
Where’d you guys go?
Love this channel...All PBS CHANNELS....MUCH LUV FROM N.AUGUSTA S.C
Hello from Across the Savannah River
@@kingjames3949 Keep your head on a swivel...Augusta is CRAZY some places..lol
I personally think Mars was so small that it couldn’t maintain itself like Earth can and it cooled off and dried up sooner.
Because of this, perhaps Mars was able to reach a temperature suitable for life earlier than Earth did? But because of the above it all went away.
Edit: Oh I also forgot to describe; apparently Earth had liquid water oceans right after the crust cooled due to how thick the atmosphere was. All the H2O was kept in liquid state despite being way above the boiling point due to the pressure from the atmosphere. I believe Mars was very similar and this is how it had water on it, and the cooling theory I said above applies.
It sounds batshit but when I was younger I always liked to think that mars had life but found out about nukes and destroyed their planet
@@tux_duhsounds like a good sci-fi
@@tux_duh If that was the case there'd be SOME traces of ruins or civilization on the surface
@@karonuva
I think it's possible that Mars had its own dinosaurs a long time ago, but then a VERY thorough extinction event happened and turned Mars into a dead planet.
@@karonuva - Radiation, too.
Omg, can anyone handle the intonation patterns of this narrator?
thought i was the only one. it's driving me crazy lol
Yeah, PBS Eons is fantastic but Michelle is definitely the weakest link
I'm intrigued, do you mean the dramatic pauses and tone? I quite enjoy it tbh
Welcome to Mars! A desolate, dry, radioactive, cold desert. We hope you enjoy your stay!
Wow, ok, this episode was surprisingly profound and poetic. Good job Michelle.
i remember reading somewhere once that some scientists believe that Earth's dynamo effect might also be contributed to by our moon and the tug of their gravity of each other. is there any reason to believe that Mars' core might've stopped being so active because they didn't have that other body to provide the necessary friction to keep the reaction going? I am fascinated by this idea
No, that's not how the dynamo works.
Tidal stresses are mainly dissipated in the mantle, not the core. So, if anything, by warming up the mantle it slightly reduces convection in the core and the dynamo's strength.
Its weird I never considered the full implications of Mars as a place. A place you could actually physically be. Despite the movies and rovers and everything my brain still categorized it as a sort of non place. Even though it definitely exists somewhere out there.
My mom watched men land on the moon, but until she looked into a telescope and saw a crescent moon, it hadn’t really been a “place”.
A decent telescope is a great help! Sadly, the best views of Mars with an amateur scope come every 18 years.
Life finds a way has got to be one of the most resilient quotes.
I never understood the reason why they drop the samples for them to be collected later.
It is surely much easier to take the samples with and just collect them all from one place.
I am sure there is a reason, contamination of other areas, loss of vehical, but none I can think of outway the huge task they have now given themselves.
When I think about how old mars is and how long ago it was possibly habitable to some kind of life, I also think of how old life is on earth, all the species we know of that lived for MILLIONS of years before it went extinct or evolved more to change into something else... And I wonder what we don't know yet. There really could have been something there.
Interestingly enough Zhurong rover soft-landed on Mars a mere 3 months later after Perseverance Quite an exciting time we live in.
Keep up the good work PBS Eons.
Didn't know "debris" had a plural form. I thought it's uncountable.
Where are you guys?
What is happening why the 2 month hiatus
Their community is still active
".....thanks to our curiosity and perseverance"...that was nice
Great video, usually when you think of PBS you think of those old videos.
Welp, i *was* doing work... but priorities 😅
Someday we may be able to terraform Mars, allowing humans to be miserable on multiple planets.
Great vid thanks for sharing
Literally perfect timing
The problem I have with the "maybe it's just because Mars is smaller than Earth" magnetic field loss theory is that Ganymede still has a magnetic field, even though it's 3/4 the size of Mars.
Simple reason: Ganymede, Io and Europa are tidally locked to each others and to Jupiter, thus creating deformations keeping the core hot. Mars or Callisto don't have such forces to keep them active.
@@PainterVierax The data from the Galileo spacecraft back in 1996 doesn't support that, I believe. Io and Europa have some minor magnetic effects due to their proximity to Jupiter, but the probe determined that Gamymede has its own magnetosphere IIRC.
@@btgardener39 I'm not fully updated on that. Nonetheless, the gravitational forces of Jupiter is why Ganymede's core didn't cool off like Mars. Same thing for some Saturn's moons like Titan or Enceladus.
That is super cool and interesting that there is evidence that life or some form of it existed on Mars I wonder will there be similar evidence on other planets in our system like Venus Titan or Europa don't know but I guess one day we will be the gardeners of life on other planets if we don't drive ourselves to extinction by greed
Venus is way too hot for life as we know it to exist there. Titan and Europa are too far away from the sun and way, way too cold. There are theories about life having been possible on ancient Venus, though. Venus' modern atmosphere has a super extreme greenhouse effect and extreme atmospherical pressure, which are believed to have been much less severe in the past. In theory, this could have made life possible.