Think they did some drilling in Sweden and pulled up solid rock cores from some 25,000 feet or so.
Solid rock cores that had bacteria in them that lived on minutes quantities of Hydrogen sulfide that was able to filter through the rocks.
Amazing!
That’s why I always chuckle a bit when someone talks about killing all the life on Earth.
Heck, short of a 30 meagaton bomb going off 500 feet over your head, it’d be near impossible to wipe out all the life that lives on a regular city block!
And odds are that a good number of the cockroaches there would get through it with little more than a mild sunburn anyways!
I remember an anecdote regarding the Bikini atoll islands, where the US conducted atmospheric tests, including some (H-bomb) which started out buried in the coral “bedrock” and vaporized at least one of the islands (there’s just a submerged stump left). When the US Navy went back some years after the last tests, men on deck could see the rats (not lookin’ healthy, but they were alive and hungry) coming down to the shore to meet the boats. ;’)