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NASA's Unexplained Files Season 4 Episode 4

The Earth Next Door

Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery at NASA reveals a top secret military space program. The Apollo missions bring back evidence that the moon may be rich in the building blocks for life.

NASA's Unexplained Files Season 4 Episode 4
NASA's Unexplained Files Season 4 Episode 4
Sep. 20, 2016