NASA's Unexplained Files

NASA's Unexplained Files· Season 4 · Episode 6

Did Earth Have Two Moons?

S04E06·October 4, 2016·1h·Science

A discovery suggests the hellish clouds of Venus may be the origin of life on Earth. A bizarre sighting 2,000 years ago raises the possibility that Earth once had two moons. A scientist helps the FBI crack the 1996 Olympic bombing.

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