When physicist Stephen Hawking made the statement that humans should prepare to leave earth, I thought the same thing, instead of doing what has to be done to stop or adapt to climate change, find renewable sources of energy, control human impact on the earth, etc, Hawking wants to blast off in space somewhere. We humans evolved to this planet. It has everything we need for life. Mars is a hostile planet, "they" have yet to find a planet in the "sweet zone" like the earth. Maybe a million years or so the sun will start to expand. By then, if we are still around, space travel makes sense.
Thursday, February 14, 2013 - 09:18