What are the chances that a meteor or asteroid orbiting nearby will collide with Earth? Will such a disaster eradicate all life on the planet? In this Discovery Channel documentary series, you'll blast off into outer space to have a look around and explore the wonders and dangers of the cosmic playground. Two-disc set includes the episodes "Earth," "Solar System," and "Galaxies." 129 min. total. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo; bonus program "Prehistoric Disasters."