Mars is a strange place and any humans born there are bound to look radically different. At some point, humans might settle Mars . But according to an evolutionary biologist, babies born on the Red Planet will look, function, and behave dramatically different from Earthlings — and all within a few generations. If we ever manage to overcome the fertility and sex troubles of space , we'll probably be popping out little humanoid children on other planets. But our little tykes might not stay little for very long. On Earth we experience the steady hand of gravity at 1 g force constantly throughout our lifetimes. On other planets in our solar system, that's just not possible. Researchers are working on ways to make artificial gravity is possible in order to make long flights easier on human bodies. According to NASA, most astronauts grow about 2 inches while they're in space because the reduced gravity causes the fluid between...