exchemist
Valued Senior Member
This BBC item reports the discovery of microtubular structures in rocks in Canada dating from 3.8-4.2bn yrs ago, which were originally beneath the ocean at hydrothermal vents.
http://www.bbc.co.uk/news/science-environment-39117523
It seems the findings are not yet fully accepted, but if they are of biological origin, that would push the earliest evidence back from stromatolites in Australia dated at 3.7bn yrs ago.
Since the Earth is 4.5bn yrs old, it starts to look as if life arose pretty soon after its formation, suggesting either that it arises fairly easily, given the right conditions, or -more controversially - that some form of panspermia mechanism might conceivably be at work.
Anyway, interesting, I thought.
http://www.bbc.co.uk/news/science-environment-39117523
It seems the findings are not yet fully accepted, but if they are of biological origin, that would push the earliest evidence back from stromatolites in Australia dated at 3.7bn yrs ago.
Since the Earth is 4.5bn yrs old, it starts to look as if life arose pretty soon after its formation, suggesting either that it arises fairly easily, given the right conditions, or -more controversially - that some form of panspermia mechanism might conceivably be at work.
Anyway, interesting, I thought.