space colonization

It seems to me that Aubrey de Grey is not a big fan of one of the possible solutions to the spiraling population expansion of the human race. That solution is to move at least some of us to other planets. Admittedly, such ideas may look like total science fiction  and up to now have usually been focused on Mars. Thus today there are considerable numbers of serious people interested in terraforming the red planet. University professors, intellectuals and adventurers support the colonization idea because a one-way trip to Mars would be probably half as expensive as a full round-trip mission. Thus, it is reasoned that Martian colonies should be set up there from the beginning. (Before colonizing Mars, however, we ought to fully utilize remote places such as Antarctica, Northern Canada, and Siberia, since those are much easier to [...]