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 🥰
@@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 😢
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.
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?
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.
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.
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.
I wonder if those microbes, if there were any, came from the rover itself. Put it to you this way: we've been sending a fair number of devices to explore mars and other parts of the solar system over the past few decades. Did we bother sterilizing any of them? Life may have already made the jump from Earth to Mars on a microscopic level.
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. 😅
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.
It would be unlikely that it died out, IF it ever existed. Once life gets going, there's not many events or circumstances that could destroy it completely. E.g. A planet would have to hit Earth do get the job done, because life exists up to 10km deep into the Earth (killing everything on the surface won't get the job done)...and life on earth exists in unthinkably extreme conditions as well (some bacteria can effortlessly survive space dispute not even having adapted specifically for that, but imagine if it were forced to).
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!
@@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.
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
@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.
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!
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.
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.
@@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.
@@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.....?
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.
@@missmarasmenstrualmuffmunc2085 I think something with completely different coding or even molecular make up would be vastly better, it would open entirely new fields and reshape what we think we know.
@@fett713akamandodragon5 that's true just for variety and scientists would have a mindgasm over it, but if it was the same then it would lend the panspermia hypothesis alot of credit which would be cool also.
@@fett713akamandodragon5 so what is your opinion on the human race being the panspermia event if we don't discover other life? I personally think that it would be our responsibility not only as a species but as a member of the only known ecosystem (if we are the only ones) to ensure it's continuation. Life is only possible for a short span of time on earth in comparison to the predicted lifespan of the universe.
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.
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
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.
@@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
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!
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.
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.
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.
@@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.
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.
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.
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.
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.
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.
@@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.
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....
Considering the cambrian explosion happened more than 3.5 billion years after the first single-celled organisms, i doubt martian life ever progressed beyond that. And considering that, i doubt they had the time to form creatures that could even try to resist changes in the enviroment It's very sad to see an (potentially) entirely new tree of life, all gone, simply because it wasn't born in the right place but then again, who am i to judge a different form of life, when all i can judge from is mine?
Considering that the most resilient organisms on our planet are microbes I think that's not much of a limitation. All the multicellular organisms that formed during our Cambrian explosion would have gone extinct, extremophile bacteria are pretty much the only organisms we know of which could survive in mars' current conditions.
@@massimocole9689 microbes on earth have evolved for 4 billion years.. They had 4 billion years to perfect their genetic machinery so that they can adapt to a variety of environmental stresses. It's obvious that the early organisms weren't that adaptable. Even cyanobacteria (which lived ~2 billion years ago) went extinct because they couldn't adapt to an oxygen-rich atmosphere. Which was ironically their own creation.
Exactly!! It's absurd that the so-called 'scientists' think that it's fair to compare earth's extremophiles with a newly formed nascent life an another planet. Earth's organisms (including bacteria) have had 4 billion years to perfect their genetic machinery. The bacteria in our gut aren't 'less evolved' than us. We both are equally evolved. It's just that E. coli took a different evolutionary direction than us. We are certainly more evolved than cyanobacteria, that lived 2 billion years ago, or Tiktaalik, that lived 400 million years ago. But we aren't more evolved than extremophiles. Or any other living creature of today. Our evolutionary history is imprinted in our DNA. >99% of it is usually non-coding (or junk) DNA. Which contains a lot of genes we don't use. Also traces of viruses and other parasites that we encountered during our evolutionary history.. We share over 90% of DNA with other mammals and have nearly 50% DNA common with plants. Although we look superficially different, at genetic level, all life on earth is interrelated. Including extremophiles. Most of our adaptation have shaped and refined over billions of years. It's very simplistic to think that nascent life which has just begun on a planet will have the capacity or genetic flexibility to adapt to extremes of environment. Under stress, most will go extinct.
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.
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.
You'd think learning the why the magnetosphere wore down over time would be a pretty pressing thing to figure out knowing that it does happen and at least one of the planets we now of needs one intact for any real hope of survival to exist.
Honestly the seasonal fart cloud is the most compelling thing that could convince me that life exists outside earth. I would love for life to be common, but we gotta get into the mindset that we might be alone out here
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.
Mars is like that old friend of yours who died prematurely at age 44, and now all that's left is the tombstone, which when you visit it, you think to yourself what might have been if your friend hadn't died too soon.
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.
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!
I appreciate ever time you thank native communities and recognize history of land and indigenous communities. I’d love to know more about fossils, discoveries, tools, and more of indigenous peoples and communities. ❤️❤️❤️
What HAPPENED?! Please, please don't tell me this has become a shorts channel only... :*( (and if this post gets hidden AGAIN, as my last "What's going on?" one did, everybody: Sort comments by latest instead of popular. That'll show you that yes, indeed, a lot of other people ARE in fact wondering WHY NO NEW EPISODES FOR OVER TWO MONTHS?!)
I heard a hypothesis that biogenesis began in our solar system not on earth, but rather on Mars, and that an impact may have knocked this primitive life all the way over to earth. Of course, it's just a hypothesis, but an interesting one, to be sure.
That sounds way too fantastical. Mars had similar conditions to Earth at one point and Earth is a far larger planet. If life could emerge on Mars, it would be more likely for it to emerge natively on Earth.
if in 30 years scientists told me there was proof that the beginning of the cephalopods lineage actually came to earth from another planet aboard an asteroid i dont think i would doubt them for a second.
@@oli1764 it's not a theory, it's a hypothesis. To be a theory requires evidence, and as there's zero evidence life started on Mars, it's only an hypothesis.
I enjoyed your video as I’m interested in Mars and hope to still be alive when the first humans land on it! I’ve subscribed and look forward to watching more of your videos.
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.
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.
"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. 🤣
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.
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?
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.
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
Sound like something I’d read on one of those musty conspiracy sites.
I wonder if those microbes, if there were any, came from the rover itself. Put it to you this way: we've been sending a fair number of devices to explore mars and other parts of the solar system over the past few decades.
Did we bother sterilizing any of them?
Life may have already made the jump from Earth to Mars on a microscopic level.
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
It would be unlikely that it died out, IF it ever existed.
Once life gets going, there's not many events or circumstances that could destroy it completely.
E.g. A planet would have to hit Earth do get the job done, because life exists up to 10km deep into the Earth (killing everything on the surface won't get the job done)...and life on earth exists in unthinkably extreme conditions as well (some bacteria can effortlessly survive space dispute not even having adapted specifically for that, but imagine if it were forced to).
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.
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.
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.
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.....?
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.
@@missmarasmenstrualmuffmunc2085 I think something with completely different coding or even molecular make up would be vastly better, it would open entirely new fields and reshape what we think we know.
@@fett713akamandodragon5 that's true just for variety and scientists would have a mindgasm over it, but if it was the same then it would lend the panspermia hypothesis alot of credit which would be cool also.
@@fett713akamandodragon5 so what is your opinion on the human race being the panspermia event if we don't discover other life? I personally think that it would be our responsibility not only as a species but as a member of the only known ecosystem (if we are the only ones) to ensure it's continuation. Life is only possible for a short span of time on earth in comparison to the predicted lifespan of the universe.
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.
"...thanks in large part to our Curiosity and Perseverance..."
We see what you did there...
I loved that part❤️
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.
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
All the puns about the rovers etc were Terra-ble! I loved them.
Roughly translated for any Martians. Ack Ack Ack Ack Ack, Ack Ack Ack.
🎶 *Yodles*
🍩🙋
💀
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!
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.
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?
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!
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.
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?
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
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.
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.
Nice word play. Kudos to the script writer. 👍
I recall reading that Mars' early atmosphere was twice as dense as Earth's--meaning it might have had a fizzy, carbonated ocean!
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.
The puns throughout this video were fantastic!
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.
Gotten to the point where when I hear “curiosity” in my head the add “ go check out curiosity stream”
"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
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 :)
Imagine a whole subterranean ecosystem underneath Mars' surface...
One of the best episodes you have ever made
Been a few months… Earth has only been around 4-billion-ish years… did we run out of things to talk about?
Considering the cambrian explosion happened more than 3.5 billion years after the first single-celled organisms, i doubt martian life ever progressed beyond that.
And considering that, i doubt they had the time to form creatures that could even try to resist changes in the enviroment
It's very sad to see an (potentially) entirely new tree of life, all gone, simply because it wasn't born in the right place
but then again, who am i to judge a different form of life, when all i can judge from is mine?
Considering that the most resilient organisms on our planet are microbes I think that's not much of a limitation. All the multicellular organisms that formed during our Cambrian explosion would have gone extinct, extremophile bacteria are pretty much the only organisms we know of which could survive in mars' current conditions.
I’d like to think the had jellyfish like creatures maybe even some that sorta drifted in the low gravity
There's methane emissions on mars so they might still exist
@@massimocole9689 microbes on earth have evolved for 4 billion years..
They had 4 billion years to perfect their genetic machinery so that they can adapt to a variety of environmental stresses.
It's obvious that the early organisms weren't that adaptable.
Even cyanobacteria (which lived ~2 billion years ago) went extinct because they couldn't adapt to an oxygen-rich atmosphere. Which was ironically their own creation.
Exactly!! It's absurd that the so-called 'scientists' think that it's fair to compare earth's extremophiles with a newly formed nascent life an another planet.
Earth's organisms (including bacteria) have had 4 billion years to perfect their genetic machinery.
The bacteria in our gut aren't 'less evolved' than us. We both are equally evolved. It's just that E. coli took a different evolutionary direction than us.
We are certainly more evolved than cyanobacteria, that lived 2 billion years ago, or Tiktaalik, that lived 400 million years ago.
But we aren't more evolved than extremophiles. Or any other living creature of today.
Our evolutionary history is imprinted in our DNA. >99% of it is usually non-coding (or junk) DNA. Which contains a lot of genes we don't use. Also traces of viruses and other parasites that we encountered during our evolutionary history.. We share over 90% of DNA with other mammals and have nearly 50% DNA common with plants.
Although we look superficially different, at genetic level, all life on earth is interrelated. Including extremophiles. Most of our adaptation have shaped and refined over billions of years.
It's very simplistic to think that nascent life which has just begun on a planet will have the capacity or genetic flexibility to adapt to extremes of environment.
Under stress, most will go extinct.
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.
Powerful episode that should be seen by everyone on earth
Something is gonna visit Mars in millions of years and think that these Johnny 5s are what inhabited the planet.
Where are y'all ?
How can I be sure, that this is absolutely certain.
Nothing in science is ever absolutely certain. Any time new evidence is introduced, we revise and update our understandings of things.
2 months since the last upload, don’t tell me the best channel on UA-cam is going to stop uploading :(((
Their community is still active
Why did you stop making full-length videos ?
Gosh it’s been 2 months now. Is there any reason to we haven’t got a new upload? I miss pbs eons
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.
It must have taken eons to work all of those puns into the script.
Planet cooled down, core stopped spinning, solar wind blew all the atmosphere....
You'd think learning the why the magnetosphere wore down over time would be a pretty pressing thing to figure out knowing that it does happen and at least one of the planets we now of needs one intact for any real hope of survival to exist.
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.
Honestly the seasonal fart cloud is the most compelling thing that could convince me that life exists outside earth. I would love for life to be common, but we gotta get into the mindset that we might be alone out here
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.
Mars is like that old friend of yours who died prematurely at age 44, and now all that's left is the tombstone, which when you visit it, you think to yourself what might have been if your friend hadn't died too soon.
I honestly can’t believe it’s been two months since eon’s last upload😢
Didn't know "debris" had a plural form. I thought it's uncountable.
I love how much fun y'all had with the script for this one
I was watching an eons video and thought "Oh how i miss Steve".
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
This will be earth in 500,000 years.
Interestingly enough Zhurong rover soft-landed on Mars a mere 3 months later after Perseverance Quite an exciting time we live in.
...does anyone still remember (and miss) my man Steve?
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!
".....thanks to our curiosity and perseverance"...that was nice
What is happening why the 2 month hiatus
Their community is still active
Love your Nails! They match your Lipstick!
"Thanks to our Curiosity and Perseverance."
I see what you did there! 😂
She had a good Opportunity to insert that in.😂
Can't wait for religious books to add new chapters in explaining life on Mars.
Someday we may be able to terraform Mars, allowing humans to be miserable on multiple planets.
Damn, Mars have really made some strides in their tourism game with this lady
Rarely does a video make me go WOW. Thank you for all your hard work.
Only David Bowie will ever know if there’s life on mars.
Where’d you guys go?
Where are you guys?? Its been 2months😥
I wonder to but they still sometimes make shorts and put out podcast i believe on spotify
PLEASE create more content. It’s been far too long.
Life finds a way has got to be one of the most resilient quotes.
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.
How could she talk about the geological features of Mars without mentioning the giant scar on it's surface?
Welp, i *was* doing work... but priorities 😅
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!
Why did this channel stop?
Probably just a long break. They still upload shorts
I appreciate ever time you thank native communities and recognize history of land and indigenous communities. I’d love to know more about fossils, discoveries, tools, and more of indigenous peoples and communities. ❤️❤️❤️
The core spins because there is a magnetic sphere, not the other way around.
i always wondered about it, thanks a lot for making this video
1:22 "curiosity and perseverance" nice reference! (it's the name of martian rovers shown on screen)
What HAPPENED?! Please, please don't tell me this has become a shorts channel only... :*(
(and if this post gets hidden AGAIN, as my last "What's going on?" one did, everybody: Sort comments by latest instead of popular. That'll show you that yes, indeed, a lot of other people ARE in fact wondering WHY NO NEW EPISODES FOR OVER TWO MONTHS?!)
I miss watching new eons episode 😭
I heard a hypothesis that biogenesis began in our solar system not on earth, but rather on Mars, and that an impact may have knocked this primitive life all the way over to earth.
Of course, it's just a hypothesis, but an interesting one, to be sure.
I'm glad atleast some else has had that theroy no matter how far fetched, I feel slightly less stupid now 🤣
That sounds way too fantastical. Mars had similar conditions to Earth at one point and Earth is a far larger planet. If life could emerge on Mars, it would be more likely for it to emerge natively on Earth.
if in 30 years scientists told me there was proof that the beginning of the cephalopods lineage actually came to earth from another planet aboard an asteroid i dont think i would doubt them for a second.
@@JubioHDX 100% this^
@@oli1764 it's not a theory, it's a hypothesis. To be a theory requires evidence, and as there's zero evidence life started on Mars, it's only an hypothesis.
I enjoyed your video as I’m interested in Mars and hope to still be alive when the first humans land on it! I’ve subscribed and look forward to watching more of your videos.
Where are you guys?
We’ve moved on another bar as the music was a bit crap. What about you? Still out?
Earth stoled my water
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
The Martians blew it up.
what is the name of the crater mentioned at the beginning of the video?
Jezero.
The poo poo crater.
@@ComaDave thanks!
@@LTLT900 Grow up.
I love the Jurassic park reference. Life indeed does find a way