
The letter mentioned that light speed had been exceeded and inter-dimensional travel achieved, thanks to the unification of fields.
Climate stabilization: the future planet Earth is completely temperature controlled and there’s a kind of immortality, via the transfer of organic consciousness, making up a thriving future population of sentient robots.
Just when the future seemed unimaginably bright, the letter stated human beings became extinct, as all species of life eventually do.
“Take care Grandfather” the letter closed lovingly.