[vanattab]

Where is the 250 million years come from?

[dredmorbius]

There are a number of likely mass-extinction / life-terminating events which will occur within the next billion or so years, either deterministically or probablisticaly (e.g., increased solar insolation and plate tectonics are deterministic, massive gamma-ray burst or killer asteroid are probabalistic), of which supercontinent-formation is only one.

Wikipedia's "Timeline of the Far Future" lists several:

<https://en.wikipedia.org/wiki/Timeline_of_the_far_future>

We likely exist in the late afternoon if not evening of Earth's habitable period.

[thangalin]

https://www.nature.com/articles/s41561-023-01259-3

[ftrobro]

Perhaps a reference to Pangea Proxima?

https://en.wikipedia.org/wiki/Pangaea_Proxima

Life might very well exist on earth even through those conditions, but not to the extent we have today.