NASA's Unexplained Files
S04E06 — Did Earth Have Two Moons?

NASA's Unexplained Files

Name: Did Earth Have Two Moons?
Released: 2016-10-04

S04E06 Did Earth Have Two Moons?

2016-10-04

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.

All Episodes

Season 4 Episodes

Pluto's Stranger Things

2016-08-30

Rise of the Planet Killer

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A President's Close Encounter

2016-09-13

The Earth Next Door

2016-09-20

Curse of the Full Moon

2016-09-27

Did Earth Have Two Moons?

2016-10-04