Martian chemicals are great for microbes, possibly toxic to humans

Last year, NASA's Curiosity Rover confirmed something discovered by multiple previous Martian landers: the surface of the red planet is full of reactive chlorinated hydrocarbons known as perchlorates. That's great news for the search for life on Mars, but it could be a disaster for any new life hoping to travel there. » 6/16/13 4:02pm 6/16/13 4:02pm