[Telepathic Intruder]

"That’s well before the sun is expected to swell into a red giant and consume us in its death throes roughly 5.4 billion years from now"

The sun also is heating up as it ages. In only half a billion years the earth will be outside the habitable zone, and the oceans will begin to evaporate away. We might want to think about moving to Mars then.

[Moonman62]

The sun also is heating up as it ages.

...

I think it’s around a 10 percent increase every billion years. And I think there is disagreement about when the Earth will become uninhabitable.