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- Thread starter Cheimoon
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That's cool!
I only heard about them a few years ago I think, but those hydrothermal vents appear to be super interesting in this discussion.
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Amazing.
Holy shit that’s surely the biggest discovery of human history?
Got to be. It’s a massive suggestion life is potentially everywhere in the solar system at the very least
It's not
Meh....not necessarily convinced of life abiotic origin. Finding nucleotides in space rocks is cool, but if they were found as individual molecules or in isolated pockets I don't think it suggests anything other than that molecule formation does indeed follow some sot of standard pattern. Studies have shown spontaneous nucleotide formation and pairing. Could life on earth have originated abiotically? Sure, and that would be cool, but I still think it is much more likely that it originated here.
Spontaneous formation and base pairing of plausible prebiotic nucleotides in water | Nature Communications
I find it likely that life on Earth originated here but the ease at which these molecules form outside the Earth system implies it’s less unlikely to have occurred elsewhere
that’s what I was gonna say
It's not a massive suggestion bro. It is a massive suggestion that the building blocks of dna are everywhere, but not technically life.
Which makes the transition from group of molecules to life far easier…
The point is if a specific set of conditions on earth created life, if the basic blocks for life are so common they are everywhere in the solar system then the likelihood of that specific set of conditions being replicated and creating life is much more likely
I'm fairly sure when we discover irrefutable proof of life outside of our planet the reactions going to be along the lines of "Well yeh duh? Put corrie back on".
Is this for real?
Does anyone actually still have any doubts of extra terrestrial life being out there?
I'm not trying to be a party pooper as I 100% believe life is everywhere in the universe, but I don't think this moves the needle at all for me. There is nothing "magical" about nucleotides, as they are rather simple small molecules. The "magic" is their role as part of DNA/RNA formation.
The very religious maybe?
feck those guys.
Extra terrestrial life covers an almost infinite range of variables.
Based upon a sample of one, we know that anywhere there is water, there is life.
But the overwhelming majority are simple bacteria.
If people think that this means there is complex or even intelligent lifeforms, that is still an extremely remote possibility. Even in our own galaxy.
I saw this in the morning and I thought I should post it here. Cool to see it posted already. 
And that in turn connects well to the idea that there must be a lot of life all over the universe. Since there is such an mind-bogglingly enormous number of stars in the universe (and likely even larger number of planets), even if the likelihood of life developing like it has done on Earth is extremely small, there would still be millions of planets with similarly advanced life, and billions upon billions with the simplest life forms. (Which in turn leads to the Fermi Paradox, but anyway. )
I still think it's a great discovery though. It's nice to assume all these things, but having actual proof of one of the tenets of the hypothesis is pretty cool.
That's something I was wondering about. If life, or at least the building blocks that allow for the creation of the life, are supposed to have come from space, then how did they arrive there? I agree that the most plausible scenario is what people are saying here, that these 'building blocks' are likely to be commonly available in space (on the scale of the universe, anyway), and so you'll find them in lots of places.
And that in turn connects well to the idea that there must be a lot of life all over the universe. Since there is such an mind-bogglingly enormous number of stars in the universe (and likely even larger number of planets), even if the likelihood of life developing like it has done on Earth is extremely small, there would still be millions of planets with similarly advanced life, and billions upon billions with the simplest life forms. (Which in turn leads to the Fermi Paradox, but anyway.
)I still think it's a great discovery though. It's nice to assume all these things, but having actual proof of one of the tenets of the hypothesis is pretty cool.
Yes. Here is today's news article in Nature:
News article: Planetary science: Building blocks of DNA detected in meteorites | Nature Communications | Nature Portfolio (natureasia.com)Nature said:
And here is the abstract of the scientific article:
Full scientific article: Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites | Nature CommunicationsArticle abstract said:
Cool, Horizon Video game knows how this goes.
Awesome thanks for the package!
Something else entirely, but also pretty cool:
Nature Briefing said:
Here's another article:
https://www.space.com/meteorites-brought-dna-blocks-to-early-earth
Wonder where the meteorites originated from? Mars, Venus, Europa?
https://www.space.com/meteorites-brought-dna-blocks-to-early-earth
Wonder where the meteorites originated from? Mars, Venus, Europa?
Astronomy is not my bag but most almost all chemical reactions require energy input, likely in the form of heat, so unless these are from the time of planetary formation or when mars was volcanically active it is likely an inner planet, right??? Could they have been ejected from earth by meteor impact? I am likely talking out of my ass.
Chondritic meteors are meteors which have not undergone any alterations, i.e. they have not undergone differentiation (where denser materials move to the centre of the body through gravity like the nickel-iron core of the Earth) or melting, which would metamorphose the rock. That means they are compositionally unchanged since before the creation of the solar system. Chondritic meteors were formed either prior to or at the formation of the solar system.
The one in the original article originates from beyond Jupiter, so it's probably from either the Kuiper Belt or the Oort Cloud (I'd imagine more likely the Kuiper Belt as the Oort Cloud is predominantly comets). The fact that there are volatiles (water, hydrogen, helium, reactive gases basically) indicates it's likely to have formed outside of the inner solar system because they are not stable as ices in the inner solar system, or at least in current models. There are planets like Jupiter which may have formed close to their stars so that may be wrong.
Interesting. So if the nucleotides were found within these meteors it would suggest that at some point after their formation they were within range of a heat source sufficient to allow for small molecule formation? Otherwise they would have been deposited afterwards which is a fun hypothesis
Thanks for explaining!
I’m not too hot on astrobiology, my interest is in the geological aspects but I guess they may have formed from the supernovae that created the asteroid, so they would have coalesced from dust during creation.Interesting. So if the nucleotides were found within these meteors it would suggest that at some point after their formation they were within range of a heat source sufficient to allow for small molecule formation? Otherwise they would have been deposited afterwards which is a fun hypothesis
Not news and not even new, but how cool is it that I am sitting here at 30,000 feet, on a plane, being able to work on high speed wifi. That just boggles my mind.
I felt similar last night when I realized that down swiping a letter on my iPad types out the symbol, no more needing to use the ‘.?123’ button.
https://www.reddit.com/r/dalle2/
Anyone seen this? All of those images are AI generated from a short prompt. Completely. AI is going to impact the world massively in the coming years, it's going to be a wild ride in the creative space.
I mean, look at this. A fecking AI made this!
Anyone seen this? All of those images are AI generated from a short prompt. Completely. AI is going to impact the world massively in the coming years, it's going to be a wild ride in the creative space.
I mean, look at this. A fecking AI made this!
I've never been so creeped out by hands.https://www.reddit.com/r/dalle2/
Anyone seen this? All of those images are AI generated from a short prompt. Completely. AI is going to impact the world massively in the coming years, it's going to be a wild ride in the creative space.
I mean, look at this. A fecking AI made this!
That's crazy - I had never even heard of that.
Do they say something about the strength of the storm? Or why do they appear?
There really needs to be a weather thread.
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