'Supercontinent' could make Earth uninhabitable in 250m years, study predicts

[NickB79]

20. Technically, there weren't any mammals around the last time Pangea formed

Mammal-like reptiles, yes, but not mammals.

And 250 million years ago, the Sun was emitting less solar radiation, so despite a higher percentage of CO2, the planet didn't go all Venus and exterminate life.

But yes, the headline is pretty misleading. Life on Earth will exist until the Sun devours it. There's more biomass underground than on the surface, ranging from extremophile bacteria to eukaryotes like nematodes, all cut off from the surface by up to a mile or two of rock.

The surface of Earth could be utterly barren and life will still exist a mile down, living in cracked rock and using chemosynthesis to eat rock and water. Once life evolves and makes it into the deep biosphere, as long as the planet has an active core, there's not much you can do to extinguish it short of destroying the entire planet.