|This is Earth|
|This is Mars|
|Humanity's New Home (An Artist's Conception)|
Frankly, though, instead of spending all the money necessary to send a few specimens of human life to Mars, as a way to "save the species," why not recognize what the wise among us know already? Human life is life inextricably linked to Planet Earth, a world we did not create, and a world upon which we are utterly dependent.
Let's spend our money figuring out how NOT to destroy the Earth, and ourselves. Then, instead of sending a few specimens off to Mars, which is, after all, a rather uncongenial location, we can provide opportunities to go camping in Yosemite:
(3) - http://news.discovery.com/space/hawking-earth-is-likely-doomed-humanity-neednt-be-160119.htm
(4) - http://www.amazon.com/Overdevelopment-Overpopulation-Overshoot-Tom-Butler/product-reviews/1939621232