An epic battle between paintballs and a giant asteroid could one day save ... Earth. Sung Wook Paek, an MIT graduate student, says a spacecraft could fire two rounds of pellets full of white ...

A Spacecraft Is on Its Way to a Harmless Asteroid Slammed by NASA in a Previous Save-The-Earth Test CAPE CANAVERAL, Fla. (AP) — A spacecraft blasted off Monday to investigate the scene of a ...