[tomcar288]

ok, so we have a loooottt of time to do that. for now, i think humanity already has waaaayyyy tooo many problems to deal with before we need to worry about that.

[kulahan]

Correct, hence the "(geological) time" bit ;)

A lot of time, but it is irrefutably a requirement, and as we research it, we'll learn lots of things to use here on Earth, too.

[posterman]

This presumes humans will survive until the point they have to deal with it. Irrefutability and far-future events are oil and water.