Join us as we investigate the hundreds of meteorites that have rocked us in the past, and the team of dedicated scientists working feverishly to protect us in the future. See how these men and women, using high-tech equipment, plan to fend off Apophis, a 250-ton behemoth heading directly for us.
VIDEOS
SNEAK PEEK: ASTEROID TRACKERS Join in the race as scientist track asteroids headed towards us, plan ahead, and try to defend the earth.
HISTORY IN HD: AMERICA IN SPACE Explore NASA's development from its founding in 1958 to its preparation for a moon landing in stunning HD as it has never been seen before.
