|
|
|
|
|
|
by Symmetry
2143 days ago
|
|
|
The potential lack of vulcanic and geological activity now is a big problem. For the first 700 millions years life on Earth depended on chemosynthesis and that's where the energy for that comes from. Presumably there could have been more active geology far in the past, though, possibly implying life that died out. |
|
|