Nasa's Unexplained Files
Did Earth Have Two Moons?
Season 4 of 8
A starling discovery suggests the toxic clouds of Venus could be the origin of life on Earth. Plus, an insight into theories that Earth once had two moons
Nasa's Unexplained Files airs on Discovery History at 2:00 PM, Wednesday 17 September. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Unexplained ➝ Mysteries