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2-bn-year-old rock harbors living microbes, rewrites life's history
(interestingengineering.com)
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this post was submitted on 08 Oct 2024
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This is interesting and important but fun fact, maybe not the first case of 2 billion+ yr old microbes. There were microbial organisms found in a mine in Minnesota coming from 2.6 billion year old rock and they suspected they were coming from water trapped when the rock, banded iron formation, formed in an ancient ocean. IIRC there were two bacteria - one that eats sulfur and excretes iron, and one that eats iron and excretes sulfur.
Soudan Mine in northern Minnesota. Great tour.
https://www.twincities.com/2008/12/22/soudan-mine-studied-for-bacterial-life/
imagine two societies spending billions of years in the dark depths eating the others poop
nature is beautiful
It’s as though the yin and yang are just a black turd and a white turd clumped together…. Beautiful.
))<>((
The dirty ourobouros.
I went there a while back, and I'll second the great tour. It's awesome that they actually maintain the elevator and let people go down. It's a pretty cool experience, though not for the claustrophobic. Never knew about the microbes, that's really interesting!
Thermodynamically, how could these two cycles sustain metabolism? Were there other processes/species in the mix to introduce chemical compounds that had more energy contained within?
I don't recall as it was mentioned by someone in passing (and stuck with me) but I can tell you that the rocks they were in are exceptionally iron rich, which is why the mine was there.
Reminds me of the primordial soup game where each players microbes need to eat to the poop of the other players. And yes it's a German game.
https://en.m.wikipedia.org/wiki/Primordial_Soup_(board_game)
So the two bacteria just eating each other's excretions in symbiotic romance?