This was an interesting read, and reminded me how paleo-biology is the closest thing to exobiology we've got. Looking at the different biomes that emerged on pl

This was an interesting read, and reminded me how paleo-biology is the closest thing to exobiology we've got. Looking at the different biomes that emerged on planet earth over a billion years feels equivalent to looking at a thousand different planets at the same time. Basically a thousand chance to see what that 'megayear' produced, life wise.