NASA's Unexplained Files Did Earth Have Two Moons? (Season 4, Episode 6)
TV-PG
TV Episode | 42 min | Documentary

Primary photo for Did Earth Have Two Moons?

NASA's Unexplained Files

Did Earth Have Two Moons? (Season 4, Episode 6)

TV-PG

TV Episode | 42 min | Documentary

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

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Cast	+ Add Cast
22 cast members

Name	Known for
Kevin H. Baines Self - Planetary Scientist Self - Planetary Scientist See fewer	Nova (1974)
Mike Baker Self - Former CIA Covert Operations Officer Self - Former CIA Covert Operations Officer See fewer	Legends (2014)
James F. Bell Self - Planetary Scientist (as Jim Bell) Self - Planetary Scientist (as Jim Bell) See fewer	Nova (1974)
Duane Carry Self - NASA Shuttle Astronaut (as Duane 'Digger' Carey) Self - NASA Shuttle Astronaut (as Duane 'Digger' Carey) See fewer	NASA's Unexplained Files (2012)
Leroy Chiao Self - NASA Shuttle Astronaut and ISS Commander Self - NASA Shuttle Astronaut and ISS Commander See fewer	Ancient Aliens (2009)
Marc D'Antonio Self - Astronomer & Image Analyst Self - Astronomer & Image Analyst See fewer	The Proof is Out There (2021)
Erik Dellums Narrator (as Erik Todd Dellums) Narrator (as Erik Todd Dellums) See fewer	Homicide: Life on the Street (1993)
Laurence Garvie Self - Meteor Expert Self - Meteor Expert See fewer	Meteorite Men (2009)
Matt Genge Self - Planetary Scientist Self - Planetary Scientist See fewer	How the Earth Was Made (2009)
Kevin R. Grazier Self - Planetary Scientist (as Kevin Grazier) Self - Planetary Scientist (as Kevin Grazier) See fewer	Escape Room: Tournament of Champions (2021)
Joe Gutheinz Self - Former NASA Senior Special Agent Self - Former NASA Senior Special Agent See fewer	NASA's Unexplained Files (2012)
David Hathaway Self, Phd., Astrophysicist (as David Hathaway Phd) Self, Phd., Astrophysicist (as David Hathaway Phd) See fewer	A World Without NASA (2020)
Richard Jurek Self - Space Historian / Author Self - Space Historian / Author See fewer	Chasing the Moon (2019)
Jerry Linenger Self - NASA Astronaut Self - NASA Astronaut See fewer	One Strange Rock (2018)
Jason Major Self - Science Writer Self - Science Writer See fewer	NASA's Unexplained Files (2012)
Chris McKay Self - Planetary Scientist Self - Planetary Scientist See fewer	The Mars Underground (2007)
Hakeem Oluseyi Self - Astrophysicist Self - Astrophysicist See fewer	The Stars in My Soul
Christopher Orwoll Self - Director, New Mexico Museum of Space History Self - Director, New Mexico Museum of Space History See fewer	NASA's Unexplained Files (2012)
Nick Pope Self - Defense Analyst Self - Defense Analyst See fewer	Contacto Extraterrestre (2013)
Seth Porges Self - Technology Writer Self - Technology Writer See fewer	Class Action Park (2020)
Winston Scott Self - NASA Astronaut Self - NASA Astronaut See fewer	Marching Beyond Halftime
Seth Shostak Self - Senior Astronomer, SETI Institute Self - Senior Astronomer, SETI Institute See fewer	The Day the Earth Stood Still (2008)