How NASA's Nuclear Rockets Will Take Us Way Beyond Mars

The first people to step on to the surface of Mars won't arrive aboard the chemical-fueled rockets that delivered Apollo 11 to the Moon—they simply don't provide enough thrust to get to the Red Planet before exposing their crews to months of dangerous space radiation. Instead, NASA is turning to long-ignored… » 4/02/13 11:34am 4/02/13 11:34am