assuming that global warming will not be our un-
doing, the year 3,000,002,007 could see mankind
on the move -

from an Earth that is being over-heated by the
evolving Sun

to a wet and cloud-covered Mars, rejuvenated by
the Sun's increasing temperature

so speculates NASA astrogeophysicist Chris McKay
in the video below



the above video is an excerpt of BBC's The Planets