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Where Did Water Come From?

PBS Eons
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Mercury, Venus, and Mars are all super low on water - so where did ours come from and why do we have so much of it? We think our water came from a few unlikely sources: meteorites, space dust, and even the sun.

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2022/09/26

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コメント数 1 566
TheOne Bman
TheOne Bman 2 ヶ月 前
Well, you see, when two hydrogen atoms and one oxygen one love eachother very much...
Chelsea Writes Stuff
Throuple goals 👌
Eben4Reel
Eben4Reel 18 日 前
… AND they’re married…
Xavi's Dad
Xavi's Dad 25 日 前
We all had that one chemistry teacher
PhysioAl1
PhysioAl1 29 日 前
Bahahaha!!
Licinius Varrus
Licinius Varrus 29 日 前
LOL
nebulan
nebulan 2 ヶ月 前
Oceans were different in the past? Based on what I've learned from Eons, the oceans at times have been: green, purple, or covered in ice
Michael
Michael ヶ月 前
@Luis Perez There are many clues. Too many to learn in your lifetime. We study those who come before us and add our own findings. What are you adding to the human kind?
nebulan
nebulan ヶ月 前
@BIG CITY Europa and Enceladus both have more water than earth. But i do prefer earth more lol
Luis Perez
Luis Perez ヶ月 前
how do you know that? were you alive?
BIG CITY
BIG CITY ヶ月 前
It's a tough sell....we gotta lotta water.(then, I guess we gotta lotta rock.) But either way, I think all this water...makes us special. Unique. Thusly........
lamrabetnouha
lamrabetnouha ヶ月 前
​@Patreeko Time sus 😳
Ivan Berecka
Ivan Berecka 2 ヶ月 前
Whoa whoa WHOA, how am I just now finding out that most of Earth's water is locked in rock, and up to 18 fricking times the amount in the oceans? Holy crap, I thought I knew stuff about stuff but I am humbled. This video also finally made me fully understand how impacts brought so much water to Earth, the key piece of information I was missing is that the Oxygen was already there! Big thank you for this one, Eons, love u
Kaitlyn L
Kaitlyn L ヶ月 前
@Pequod Requiem it was meant to be more of a “you’re welcome” / general agreement, but I had run out of words last night
Pequod Requiem
Pequod Requiem ヶ月 前
@Kaitlyn L : ) regarding what in particular? or just general positivity? : ) ok thanks : )
Kaitlyn L
Kaitlyn L ヶ月 前
@Pequod Requiem 👍 😁
Daniel Brown
Daniel Brown ヶ月 前
Watching PBS Eons = Being humbled = Learning🕯
Pequod Requiem
Pequod Requiem ヶ月 前
@Kaitlyn L Well put, thank you. It does help to think of things in those terms of areas of specialization under a funding umbrella that is PBS. I also check Wikipedia often for the full rundown on a topic, though I know it isn't 100% either.
Bay Stated
Bay Stated 2 ヶ月 前
This is the best Earth Water story that I have ever watched, even from cinematic space documentary series and cable channel productions. Other documentaries about the origin of water have a feel that the film makers didn't understand the details, and so skipped over most of it. Eons talks about the early sun, gravity, heat, pressure, MINERALS, time limits, and most importantly the acknowledgment that billions of years have affected the evidence left for us to study today.
Seth Tenrec
Seth Tenrec 19 日 前
@Skip Hoffenflaven
Skip Hoffenflaven
It is amazing what more people could know if they could just lose a little bit of their adherence to myths.
notfiveo
notfiveo ヶ月 前
4.5 billion years and it only took us less than a couple hundred years to pollute all of it.
Mitch Johnson
Mitch Johnson ヶ月 前
Also vulcanism
Chris Lee
Chris Lee 2 ヶ月 前
The more you learn about how the earth formed it just feels seems more and more improbable. The fact that we exist means these series of improbable events did happen. But the more improbable we find it to be the less likely that complex life is common outside of the solar system. It will be truly fascinating to learn of another life form one day and how they formed.
Baul Punyan
Baul Punyan 11 日 前
It's crazy that people know what was going on millions of years ago but they still don't know how to time travel.
Shay McQuaid
Shay McQuaid 19 日 前
You're not factoring in how unfathomably large the universe is. If it happened once, it happened maybe infinite times...
SciTecEng2Hedz
SciTecEng2Hedz 21 日 前
@Panse Pot cool
Jason Olinger
Jason Olinger ヶ月 前
This is just another scientist far reaching his or her idea of understanding something too complex for humans to know.
Denny Smith
Denny Smith ヶ月 前
@Mgz _ Mmm, sounds fascinating, but I would say that's not the case. I'm not sure why the simple possibility of life emerging elsewhere somehow got baked into complicated muffins of infinity enduring eternally across many dimensions beyond four. We've got a handful of viewers (5?) holding forth on many more topics (6?) than which any of us (0?) is truly qualified to elucidate.
Drummer Daddio
Drummer Daddio 2 ヶ月 前
Learning about the history of this planet, and understanding how at any point things could have taken a different trajectory, makes me so grateful to exist. It's like anti- nihilism. We are so fortunate to exist and blessed to be able to experience life on this miracle planet. We aren't just some insignificant specks in the middle of this vast, uncaring universe. We are exceptional through and through. I love this channel!
Aayush Boliya
Aayush Boliya 20 日 前
how is it anti-nihilist? it is infact more nihilist
sehra
sehra ヶ月 前
same!
Mark S
Mark S ヶ月 前
why is it fortunate to exist? Before you were born, did you consider yourself unfortunate?
리주민
리주민 ヶ月 前
Now they made me think of another question: how did the earth lose the 215 bars of atmosphere in one age (we're down to 1 bar now)? Was it massive solar wind after the faint young sun (paradox) became hotter and more active?
KiraKulani
KiraKulani ヶ月 前
This is a beautiful way to interpret this concept ❤
T. Augustus Romer
T. Augustus Romer 2 ヶ月 前
This makes more sense to me than any other water origin explanation. THANK YOU!!
Terry Bryant
Terry Bryant 17 日 前
@Seth Tenrec pride doeth go before a fall
Seth Tenrec
Seth Tenrec 19 日 前
@Terry Bryant lmao, feeb
Terry Bryant
Terry Bryant ヶ月 前
@Daniel Hill Intelligent Design
Daniel Hill
Daniel Hill ヶ月 前
What other water origin explanations have you heard?💦just curious.
Terry Bryant
Terry Bryant ヶ月 前
@King British Where did the material to create the solar system come from?
L P
L P 2 ヶ月 前
Love, love, love this channel! Thanks for all your hard work. PBS is truly a national treasure.
SciTecEng2Hedz
SciTecEng2Hedz 21 日 前
Donate
Michael McChesney
Michael McChesney 2 ヶ月 前
I remember watching a science fiction show years ago where, as part of terraforming Mars, comets had their orbits adjusted so that they would crash into Mars. Since comets, in the outer solar system at least, are basically dirty snowballs, that might not be a bad idea. You just need to be careful you don't accidently crash one of those comets into Earth.
Fredrik Dunge
Fredrik Dunge ヶ月 前
You'd still need to vapourise them and at the moment Mars doens't have the atmosphere for rocks of crystalized water to vaourise them. Venus might.
uzesamaX
uzesamaX 2 ヶ月 前
I always asked myself "how could water form if after the collision with Theia the earth surface was so hot"? Luckily I got my answer
Fredrik Dunge
Fredrik Dunge 21 日 前
@SciTecEng2Hedz Some of it became part of earth, a lot of it became the moon.
SciTecEng2Hedz
SciTecEng2Hedz 21 日 前
What happened to Theia?
Fredrik Dunge
Fredrik Dunge ヶ月 前
Actually she got it slightly wrong. It's not the Pressure it's the pressure of water vapour alone. Each evaporaiton/condensation pairing depends only on it's own pressure as a gas compared to it's temperature as gas and liquid. If we said filled the atmosphere with Argon (which is pretty much intert) we'd not see a drop more rainfall. Thus it's because Earth was so hot after it's colision with Theia that the water vapour pressure could get so high, it was so warm it kept evaporating water even at super high pressures. Until the pressure got so high or the temperature dipped low enough that this equilibrium started shifting the other way and condensation overcame evaporaiton. It's why if we sent water the venus it would not fall as rain, because hwile the Pressure there is likely a lot like the hadean period, it's relative pressure for water vapour is low because if the lack of water in it's atmosphere.
Jaydon Booth
Jaydon Booth 2 ヶ月 前
This felt like watching a PBS Space Time episode. Very interesting, I've wondered about water origins quite a bit lately when it's mentioned in other videos I watch but none of those have dived into it like Eons.
Jesse Gregory
Jesse Gregory 2 ヶ月 前
Just wanted to say I love the channel and the content always learning something new, and it's very easy to understand even though Ive spent my life studying as a mechanic not in this area thanks :) viewing from new Zealand 🇳🇿
Don Bucher
Don Bucher ヶ月 前
As a chemistry/earth science teacher, I must say this video really hit home. Every kid does the decomposition of copper sulfate pentahydrate in chemistry. It’s an extra added kick to add that this is how Earth got most of its water!
Fredrik Dunge
Fredrik Dunge ヶ月 前
Or you know the burning of Gypsum.
Amos Bordowitz
Amos Bordowitz 2 ヶ月 前
i absolutely love Kalie's presentation style. also the self deprecating humor at the end - loved it
Ricky
Ricky ヶ月 前
@Stephen Edwards I'll just stick to drinking unfiltered lake water
Stephen Edwards
Stephen Edwards ヶ月 前
@Ricky make it yourself: two parts H, one part O
Ricky
Ricky ヶ月 前
I want to drink some brand new water. Tired of all this old water I've been drinking
Stephen Edwards
Stephen Edwards ヶ月 前
This was one of her best. Very well done
cristian fr
cristian fr 2 ヶ月 前
Two topics that i enjoy the most, natural history and space, 2 days left for my birthday but for me, this is an anticipated gift, im suscribed to the channel and 0 regrets, amazing work and dedication, a sincere thank you for the whole team.
Jordan May
Jordan May ヶ月 前
Happy Birthday to you too! Did you know that 9/29 is known as the "Day of the Charged Reactor"? Look it up. Space and History are my favorite topics too! I am turning "The Answer to Life the Universe and Everything" this year... BIG YIKES! But hey... If I get those kinda answers this year I am ok with it!
cristian fr
cristian fr 2 ヶ月 前
@Jordan May just in case, happy birthday in advance Jordan! 🥳
Jordan May
Jordan May 2 ヶ月 前
My birthday is in 2 days too!
ancestralworm
ancestralworm 2 ヶ月 前
"Space dust and sky pebbles." I experimented with some of that in the 90s.
David Blankenship
Wow
David Blankenship
Far Out Man
ancestralworm
ancestralworm ヶ月 前
@James Driscoll_tmp that's not enough, man. Go for broke.
Leo Gese
Leo Gese ヶ月 前
me,, during the 70s. it was cleaner back then..
James Driscoll_tmp
James Driscoll_tmp 2 ヶ月 前
Plutonium niborg?
Lauren Smith
Lauren Smith 4 日 前
This was very informative! Most explanations skip over the obvious question "well, where did the space ice come from?" but this video explained it very clearly. Thank you!
Keith Johnson
Keith Johnson ヶ月 前
Bloody love this channel. I’ve looked into how earth got its water a few times but this was the most in depth and plausible explanation thus far, thank you for enriching our minds 😊
Ted Etienne
Ted Etienne 2 ヶ月 前
Very interesting! When I was young, I learned that our water mainly came from comets, mostly during the Late Heavy Bombardment. But this video doesn't mention the LHB at all. What changed?
Keith Faulkner
Keith Faulkner ヶ月 前
@tsmspace totally agree. But the LHB was supposedly a much narrower time period. Please understand i'm not advocating either way. Just saying what I heard.
tsmspace
tsmspace 2 ヶ月 前
@Keith Faulkner it's not outrageous to assume that perhaps we don't really have a particularly clear and accurate idea of all of that time. But actually something like a billion years of more frequent asteroids isn't really a crazy idea either.
George Hugh
George Hugh 2 ヶ月 前
@Keith Faulkner In fact, it was a conspiracy theory from the Heavy Water Lobby...
Keith Faulkner
Keith Faulkner 2 ヶ月 前
I recall from another utube channel that the Late Heavy Bombardment might have not happened at all. Somebody doubts that period of history.
Nikki Berry
Nikki Berry ヶ月 前
With how drastically different earth's atmosphere has been over time, I can't help but wonder how far back in time someone could travel before just stepping out of the machine and breathing the air would kill them.
Psychkemia
Psychkemia 2 ヶ月 前
I never knew that the same event that led to the formation of Earth's moon was the same event that allowed water-carrying meteroids to melt on Earth. The moon is more linked to Earth's oceans than I thought!
jon velz
jon velz ヶ月 前
I love how this episode goes far back in time and way beyond the usual paleo centric info we usually see. Chemistry is NOT my strong suit but I'm convinced Kallie can teach me anything and I will learn it.
Adam Bower
Adam Bower 2 ヶ月 前
Why was the atmosphere so heavy, and why did it (relatively) quickly dissipate to the equilibrium it's maintained since? Would love an episode about that. Where the gasses came from, how they accreted/accumulated, and why earth lost that pressure the way it did.
Izzy Aisa
Izzy Aisa ヶ月 前
@Zack Clarke no. More like 5 trillion years!!! Scientist love to throw big numbers when it comes to the universe when in fact its all a theory at best
Zack Clarke
Zack Clarke ヶ月 前
Took place over a half billion years. Not sure I'd call that relatively quick even in Geological terms haha
리주민
리주민 ヶ月 前
Exactly. Made me think of the same question: Now they made me think of another question: how did the earth lose the 215 bars of atmosphere in one age (we're down to 1 bar now)? Was it massive solar wind after the faint young sun (paradox) became hotter and more active?
Devthethird
Devthethird ヶ月 前
There was something I read a few years ago that talked about this topic. "Thanks to Rosetta and Philae, scientists discovered that the ratio of heavy water (water made from deuterium) to “regular” water (made from regular old hydrogen) on comets was different than that on Earth, suggesting that, at most, 10% of Earth's water could have originated on a comet".
🍑Loiza C̴h̴a̴t̴ ̴ Me̴ n̴Ow̴- CHECK MY PROFILE
Just wanted to say I love the channel and the content always learning something new, and it's very easy to understand even though Ive spent my life studying as a mechanic not in this area thanks :) viewing from new Zealand 🇳🇿
Change Gamer
Change Gamer 2 ヶ月 前
I always wondered: how many asteroids were needed to bring all the water to earth? Isn‘t also possible the protoplanet of Earth already had a lot of water?
Gregory Fenn
Gregory Fenn 2 ヶ月 前
The protoplanet was too close to the sun to have much Hydrogen, as the video says.
Kinw2
Kinw2 2 ヶ月 前
One of my most favorite episodes. I am definitely looking forward to the October 12, 2022 fun event. I also love that the comments sections of the series are characteristically respectful and convivial. Thanks from Chicago, Illinois USA
Yo It’s ConNiggTiv
I always had a issues about how earth got its water" the amount of impact had to be overwhelming. What are the other options on how earth received its water ?
Kedo
Kedo ヶ月 前
The more you learn about how the earth formed it just feels seems more and more improbable. The fact that we exist means these series of improbable events did happen. But the more improbable we find it to be the less likely that complex life is common outside of the solar system. It will be truly fascinating to learn of another life form one day and how they formed.
Kazekid
Kazekid 2 ヶ月 前
Wasn't expecting a bunch of space talk on Eons but I am here for it and loving it
Martín Formento
Martín Formento 2 ヶ月 前
I've always wondered... What if Tea was like an icy moon, maybe like Europe? Knocked out of orbit by the chaotic early years of the solar system and put on a collision course with earth bringing back lots of Water... Wouldn't that be possible?
리주민
리주민 ヶ月 前
Now you made me think of another question: how did the earth lose the 215 bars of atmosphere in one age (we're down to 1 bar now)? Was it massive solar wind after the faint young sun (paradox) became hotter and more active?
mrpc5971
mrpc5971 2 ヶ月 前
This is the best episode I've seen so far. Had no idea it could have come from our sun. Mind blown.
ILHAN TheDiamondCrafter
This is fascinating. What a great video! It opens my horizon even more pertaining the existence of water. Thank you for the wonderful knowledge you have given to us
Vigilant Sycamore
The great thing about deuterium is that because of its different size, deuterium-based water interacts with light differently to regular water, so a deuterium ocean would be clear, not blue.
tdfh1
tdfh1 2 ヶ月 前
Great video! Very informative. Follow-up question if anyone is inclined to answer: If our water came from asteroids, why isn’t there a similar amount of water on Venus? I’ve read that Venus is very dry, so what accounts for the difference?
HaikatrineKat
HaikatrineKat ヶ月 前
This makes me wonder about how the Hadean could've been involved with the development of our atmosphere. What kind of atmosphere did Earth have at that point? That's something one doesn't seen examined often. How, when, and for how long did the ozone develop? We'd be pretty out of luck without all this air. It's so fascinating how every material is just layered so perfectly and in the proper states to form a planet that has been host to life for eons. Thanks PBS Eons for letting us take a look at all the epic epochs. 😎
Andrew Raphael
Andrew Raphael ヶ月 前
There was no ozone until after the Great Oxygenation Event because there was no atmospheric oxygen until then. Ozone O3 molecules are formed from oxygen O2 molecules.
ricardo ludwig
ricardo ludwig ヶ月 前
Ok, now that begs another question: If Earth's water all (or at least mostly) comes from meteorite impacts, why do the other rocky planets not have nearly the same amount of water?
Mia Fidanze
Mia Fidanze 2 ヶ月 前
This is one of my favorite videos, super interesting and very well explained!
Tragoudistros.MPH
Tragoudistros.MPH 2 ヶ月 前
Eons made chemistry interesting and made me want Star water from a cracked asteroid... The things you do to me, PBS 🥰
FoxMlder
FoxMlder ヶ月 前
We love you guys so much hope I can catch the stream! Thanks for making this amazing content!
Rais
Rais ヶ月 前
Mars is not "super low" on water. In earlier times it had a lot more than it has now but it still has big polar ice caps kilometres thick and many other ice deposits just below the surface in lower latitudes. Some scientists believe that Venus also started off with oceans but lost them rather quickly.
AndyPanda9
AndyPanda9 ヶ月 前
This is an excellent explanation of where our water came from. Thank you so much for making this video!
Mathieu D
Mathieu D ヶ月 前
The more I learn about the Earth the more I think that life must be rare in the universe, as the chances to get suitable conditions to support it seem unlikely.
Stella
Stella ヶ月 前
But theres infinite time and chances
Dutch166462
Dutch166462 ヶ月 前
Great video. Interesting and very well explained!
Gracefulsledge
Gracefulsledge ヶ月 前
Here is my hypothesis. I think there was also a lot of water molecules in the accretion disk. That and comets delivered the water. And our location in the solar system and the thin atmosphere (of what ever type of gases) that we likely had, helped us keep it.
G
G 2 ヶ月 前
i mean, maybe water close to the sun IS somehow standard, but the lack of any magnetic field like ours and the billions of years of sun winds blasting the water from the other rock planets just makes look like water at this distance is rare
Albert Åkesson
Albert Åkesson ヶ月 前
I love this story of how water accumulates to Earth, chaos is so intense and interesting once you realise where stuff come from.
Balázs Molnár
Balázs Molnár 2 ヶ月 前
Didn't Earth's mantle also contain some already present hidrogen atoms that took part in the formation of water during volcanic eruptions? I mean, I get that hidrogen being lighter is concentrated further out in the solar system, but was there close to zero hidrogen inside Earth at some point?
Aryadi Subagio
Aryadi Subagio ヶ月 前
I knew that habitable planets have to form in the star's goldilock zone but it never occured to me that they will be so close to their host star it will be hard for waters to form. That finally explains why other inner planets don't have water as much as the earth! The more I know about the history of our planet, Rare Earth Theory just seems more plausible.
That Jenna, Gaming
There's also a theory that Theia, the protoplanet that collided with Earth that they were speaking of, is the one that brought water to Earth, since, in theory, in formed in the outer solar system, and could have been comprised of much more water than early Earth was, considering the Moon also has a decent amount of water locked away as well. I'm surprised they didn't even mention this theory during this episode :(
Tschang-Hi Lee
Tschang-Hi Lee ヶ月 前
So what made Earth('s water) different from Mars or Venus? I sort of get that Venus might have been too hot such that water never cooled as a liquid, but what about Mars? Maybe because it was smaller it could not trap enough meteorites?
C W
C W ヶ月 前
I have undergraduate degrees in both astrophysics and historical geology. I find it hilarious that you state things as fact that absolutely are not proven as fact. What you're stating is almost certainly true but you state them as fact and that's crossing the line.
dlanska
dlanska 2 ヶ月 前
Very well and entertainingly written and presented. Well done.
brbuche
brbuche ヶ月 前
The writers forgot to talk about a very important event….The earth moon collision. Whatever moon or planetary body collided with the early Earth also could have provided some water from the outer solar system, perhaps coupled with Jupiter's grand tack.
Dave Vann
Dave Vann 2 ヶ月 前
More water has been discovered in the Earth's mantle. An inclusion of minerals in a diamond that formed about 660 mm deep in the mantle, indicates that there may be much more water in the deep mantle that previously thought. Now to figure out how that water got there.
George Ginsburg
George Ginsburg ヶ月 前
1) was the magnetosphere not as strong as it is today, to allow so much water-containing space debris to hit the Earth instead of being deflected? 2) Since the atmosphere was so different with little to no oxygen, and much more pressurized, would space debris not burn up when entering the atmosphere?
Kedo
Kedo ヶ月 前
Whoa whoa WHOA, how am I just now finding out that most of Earth's water is locked in rock, and up to 18 fricking times the amount in the oceans? Holy crap, I thought I knew stuff about stuff but I am humbled. This video also finally made me fully understand how impacts brought so much water to Earth, the key piece of information I was missing is that the Oxygen was already there! Big thank you for this one, Eons, love u
phionella7
phionella7 ヶ月 前
I love watching this channel the topics are interesting but more importantly Kalle, Blake and Michelle are FANTASTIC story tellers
Bobby Davis
Bobby Davis ヶ月 前
If the sun passed through a type 1 supernova, couldn't water be formed from the hydrogen given off by the sun and oxygen from the supernova?
Peter Tattum
Peter Tattum ヶ月 前
Thank you, PBS, for these wonderful videos.
Richard Vasquez
Richard Vasquez ヶ月 前
Amazing! I didn't realize that some of the solar wind is protons from the sun.😯
Record.Retake .Repeat
The goldilocks zone is also debateable since a planet must also have a strong magnetic field to bounce off harmful rays and also an atmosphere that can let life thrive.
Andrew Walker
Andrew Walker 2 ヶ月 前
Only took 72 years on earth to get a comprehensible explaination of where water came from. Thank you, much appreciated.
Mortonator
Mortonator ヶ月 前
Wait... so could we send oxygen to space, and mix it with light hydrogen to make water? Also don't rocket engines use hydrogen as fuel, can we use light hydrogen?
David Collier
David Collier ヶ月 前
I love the presenters for Eons! Their enthusiasm for the topics is infectious.
saso yan
saso yan ヶ月 前
I love the presenters for Eons! Their enthusiasm for the topics is infectious.
FuzzyAziraphale
FuzzyAziraphale ヶ月 前
I didn't realise that how water arrived on Earth was this intricate and fascinating. I always thought the water was just deposited on Earth as a result of ice comet impacts.
Bowfinger
Bowfinger ヶ月 前
Great episode. I would very much like to hear the story of water on mercury Venus and Mars!
LemonJoep
LemonJoep ヶ月 前
I always assumed Venus had a decent amount of water, it was just all tied up in thick clouds of aqueous sulfuric acid, but the comment at 0:56 it made me curious how little it has. After a short google (so take it with a grain of salt) it looks like its atmosphere has about 14 times less water than earth in total (20 ppm compared to our 25,000 ppm here, but its atmosphere is about 90 times denser), and obviously no surface water (atmospheric water only makes up 0.001% of our water here), so yeah, damn, if my maths is even close to right I was well off. I think I assumed it had a lot more water based on how thick its clouds are, but it's probably just that the sulfuric acid clouds are better at reflecting light than ours so seemed thicker to me.
nebulan
nebulan ヶ月 前
I thought so too, thanks for these clarification!
PopsGG
PopsGG 19 日 前
It would be interesting to estimate how much impact living creatures have made on our water supply. Plants rip apart water molecules and free the Oxygen as waste. Animals breath in Oxygen and exhale H20.
FlyToTheRain
FlyToTheRain ヶ月 前
the idea of of meteorites being space coconuts with star water on the inside is something i want an artist to visualize and create, it sounds like a beautiful idea
William Litsch
William Litsch 11 日 前
I like the info, but the conclusion is somewhat illogical. The early Earth, whether it was struck by a large planetessimal or not was itself made from the same proto-planetary disk material that later asteroids were. It likely already had all the rock hydrates containing water. So it gets launched into space. That water vapor would not be in the snow zone so it could have gotten exposed to the solar wind then and then reagglomerated as Earth stabilized from the impact. The impact aftermath itself might have made more light hydrogen and then fallen back to Earth as free water vapor or rock hydrates.
sstrick500
sstrick500 ヶ月 前
It really is many, many, many perfect storms that allows life on Earth!
Mitch Johnson
Mitch Johnson ヶ月 前
That’s funny. After you said the water was too light I had a theory based on solar wind, but it’s kind of the exact opposite. I theorize that chrondrites exposed to 4.5 billion more years of solar wind might have heavier water than the chondrites that may have bombarded early earth.
Eloi Homier
Eloi Homier ヶ月 前
Wow! One of the best Eons videos, and that's saying a lot because Eons videos are always great!
MIKE SCHULIK
MIKE SCHULIK ヶ月 前
Great video! Very informative, outstanding heavies and a well placed CT!!!
B T
B T ヶ月 前
Hold on, how did earth’s atmosphere drop from 215 bar to 1 atm in such a short time???
ronkirk50
ronkirk50 ヶ月 前
I guess back in the day, one of the first theories was that Earth was just bashed by a bunch of comets, but this new research points to way more interesting source of Earth's water.
Victor Felix
Victor Felix ヶ月 前
**I have a question** I love all your shows. Thank you for all you do. However I don"t konw about the statemet that Earth is coverd by an estimated 366 trillion gallons of water. A cubic mile of water equals more than 1.1 trillion gallons. The total amount is estimated to be 326 million cubic miles (326x106 cubic miles). Making the total amount of water available about 326 quintillion gallons or 1233.91 quintillion liters.
ThePromise78
ThePromise78 29 日 前
EONS always does such a great job!
Offend The Offender
2 minutes in and I'm amazed. Well done PBS Èons. This video is absolutely fantastic.
LoRe ZampaDeFerro
Could the atmosphere "evaporate" and vanish an atom at time in the space?
MrAyrit
MrAyrit ヶ月 前
Great vid, this is always a question that comes up. While I cant say that I totally understand all the science there, it a much more in depth explanation than I’ve heard previously.
SunriseLAW
SunriseLAW 14 日 前
We know as fact that comets are sometimes made out of lots of water. So it makes logical sense that a comet brought the water and probably the basic microbial building blocks that formed and evolved plants and animals to be host organisms.
Carey Stoneking
Carey Stoneking 2 ヶ月 前
Water is so stable there is a high probability that the last glass you drank had molecules that were previously drank by several famous historical people. We will skip that part on how it left them. 😮
Fredrik Dunge
Fredrik Dunge ヶ月 前
@Carey Stoneking Cellulose isn't hydrophobic, it's hydrophillic you can tell by the fact that it has OH groups on the outside. hydrogen attached to oxygen is pretty mcuh the defnition of hydrophillic (works with Flourine and Nitrogen instead of oxygen too, anything sufficiently eloctronegative). Edit: You're thinking of it beign consdiered a non soluable fibre when it comes to diet I take it? That's not the same thing. Celulose does not lose its molecular integrity in water that's true but it's still very hydrophilic.
Carey Stoneking
Carey Stoneking ヶ月 前
@Fredrik Dunge , cellulose is probably the most common natural organic compound, and it is insoluble in water, as are hydrocarbons, fats, so I respectfully disagree. I taught organic chemistry and biochemistry for several years, but I could always be wrong. Peace. Feel free to have the last word.
Fredrik Dunge
Fredrik Dunge ヶ月 前
@Carey Stoneking Eh what? No most naturally occuring organic chemistry is hydrophillic. It's when we synthetize things in lab we work with hydrophic conditions to speed up reaction times.
Carey Stoneking
Carey Stoneking ヶ月 前
@Fredrik Dunge , I think that’s more general/inorganic chemistry, especially in acidic solutions. Most organic compounds are hydrophobic, and reactions are carried out in nonpolar aprotic solutions. Peace
Fredrik Dunge
Fredrik Dunge ヶ月 前
Actually if you go into organic chemistry you'll see water giving up it's hydrogens and picking up extras (to later relase one of them at random) quite a lot. The destruction of water molecules is rather rare yes but it has quite a lot of turnover in the hydrogen atoms. It's more correct to say that the oxygen atoms involved in water tend to stay as part of water, the hydrogen atoms are more fickle.
John Thang
John Thang ヶ月 前
So does it mean that we have very little possibilities of finding another planet like earth that is in Goldilocks zone and holds water? Since all this explanation sounds like we got water by luck. 😢
alison moore
alison moore ヶ月 前
Loved it although I wish we humans looked after this planet a hell of a lot better.
WizardBarbie
WizardBarbie ヶ月 前
This is my absolute favorite channel! 🖤
Alice Walker
Alice Walker 2 ヶ月 前
I loved this episode! 💜 So cool 🤯
gerrady420
gerrady420 6 日 前
What mystifies me is how our sun formed from left over gases left from a super nova, so the star that made that super nova didn't leave a another body behind? It was completely obliterated??
KillerSugar
KillerSugar ヶ月 前
Wouldn’t the other nearby planets have been subjected to the same process (dust/pebbles/solar wind)?
d00mbot9000
d00mbot9000 2 ヶ月 前
5:30 I live in the mountains a few hours out of Denver and we have to adjust to special "altitude cooking" rules!
James Webb
James Webb ヶ月 前
Is there a hypothesis that maybe the planet that smashed into us came from the region of the solar system where water was more abundant?
Dustin Sullivan
Dustin Sullivan ヶ月 前
So, had Earth not had the late impact with Thea producing the late magma ocean, Earth would have negligible water? Also, should we conclude the moon doesn't have an ocean because it hardened faster so it had a shorter magma period?
Kedo
Kedo ヶ月 前
Oceans were different in the past? Based on what I've learned from Eons, the oceans at times have been: green, purple, or covered in ice
L̴i̴n̴a̴ C̴h̴a̴tT ̴ -m̴e̴- 👉t@p
Oceans were different in the past? Based on what I've learned from Eons, the oceans at times have been: green, purple, or covered in ice
Anon Surfer
Anon Surfer ヶ月 前
Earth must have gotten bombarded with a lot of meteorites for so much water to have been transmitted. So, how's it that gas giants like Jupiter failed to intercept these meteorites?
nabil adoui
nabil adoui 9 日 前
one question though, why water quantities on the other rocky planets are small ? wouldn't the same process that gave earth water do the same for the other ones ?
Tanny k
Tanny k ヶ月 前
Very interesting and informative video. Thanks PBS
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