That's cool!
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Holy shit that’s surely the biggest discovery of human history?Tweet
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Amazing.
Got to be. It’s a massive suggestion life is potentially everywhere in the solar system at the very leastHoly shit that’s surely the biggest discovery of human history?
It's notGot to be. It’s a massive suggestion life is potentially everywhere in the solar system at the very least
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.Tweet
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Amazing.
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 elsewhereMeh....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
that’s what I was gonna sayMeh....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
It's not a massive suggestion bro. It is a massive suggestion that the building blocks of dna are everywhere, but not technically life.Got to be. It’s a massive suggestion life is potentially everywhere in the solar system at the very least
Which makes the transition from group of molecules to life far easier…It's not a massive suggestion bro. It is a massive suggestion that the building blocks of dna are everywhere, but not technically life.
Does anyone actually still have any doubts of extra terrestrial life being out there?Got to be. It’s a massive suggestion life is potentially everywhere in the solar system at the very least
The very religious maybe?Does anyone actually still have any doubts of extra terrestrial life being out there?
feck those guys.The very religious maybe?
Extra terrestrial life covers an almost infinite range of variables.Does anyone actually still have any doubts of extra terrestrial life being out there?
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.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
Yes. Here is today's news article in Nature:Is this for real?
News article: Planetary science: Building blocks of DNA detected in meteorites | Nature Communications | Nature Portfolio (natureasia.com)Nature said:Planetary science: Building blocks of DNA detected in meteorites
Pyrimidine nucleobases that are necessary for building DNA or RNA may have been delivered to Earth by carbon-rich meteorites, suggests a paper published in Nature Communications.
Two types of chemical building blocks, or nucleobases, are needed to form DNA and RNA. These are the pyrimidines, which include cytosine, uracil and thymine, and the purines, for example guanine and adenine. Thus far, only purine nucleobases and uracil have been identified in meteorites. However, the detection of pyrimidines in laboratory experiments simulating conditions in the interstellar media — the space between stars — has led to speculation that meteoritic delivery may have occurred.
Using state-of-the-art analytical techniques optimised for the small-scale quantification of nucleobases, Yasuhiro Oba and colleagues analysed 3 carbon-rich meteorites; the Murchison, Murray and Tagish Lake meteorites. In addition to compounds that have previously been detected in meteorites — such as guanine, adenine and uracil — the authors identify various pyrimidine nucleobases, such as cytosine and thymine, for the first time at concentration levels up to parts per billion. These compounds are present at concentrations similar to those predicted by experiments replicating conditions which existed prior to the formation of the solar system.
The authors conclude that these findings suggest that such compounds may have been partly generated by photochemical reactions in the interstellar media, which later led to their incorporation into asteroids as the solar system formed. Their eventual delivery to Earth by meteorites may have subsequently played a role in the emergence of genetic functions for early life.
Full scientific article: Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites | Nature CommunicationsArticle abstract said:The lack of pyrimidine diversity in meteorites remains a mystery since prebiotic chemical models and laboratory experiments have predicted that these compounds can also be produced from chemical precursors found in meteorites. Here we report the detection of nucleobases in three carbonaceous meteorites using state-of-the-art analytical techniques optimized for small-scale quantification of nucleobases down to the range of parts per trillion (ppt). In addition to previously detected purine nucleobases in meteorites such as guanine and adenine, we identify various pyrimidine nucleobases such as cytosine, uracil, and thymine, and their structural isomers such as isocytosine, imidazole-4-carboxylic acid, and 6-methyluracil, respectively. Given the similarity in the molecular distribution of pyrimidines in meteorites and those in photon-processed interstellar ice analogues, some of these derivatives could have been generated by photochemical reactions prevailing in the interstellar medium and later incorporated into asteroids during solar system formation. This study demonstrates that a diversity of meteoritic nucleobases could serve as building blocks of DNA and RNA on the early Earth.
Awesome thanks for the package!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)
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 Communications
Nature Briefing said:Jumping robot leaps to record heights
Roboticists have managed to design a device capable of leaping more than 30 metres into the air. That’s triple the current record for a jumping robot. The robot has a motor that stretches a spring, which drives the jump. Researchers say that this might be near the mathematical limit for jump height using current materials.
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.Here's another article:
https://www.space.com/meteorites-brought-dna-blocks-to-early-earth
Wonder where the meteorites originated from? Mars, Venus, Europa?
Here's another article:
https://www.space.com/meteorites-brought-dna-blocks-to-early-earth
Wonder where the meteorites originated from? Mars, Venus, Europa?
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.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.
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 hypothesisChondritic 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.
Thanks for explaining!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.
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
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.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'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.
There really needs to be a weather thread.
There's a "mini" version, with a lot less power. It created... something.I've never been so creeped out by hands.
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