Season 4 (2016)

Pluto's Stranger Things
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August 30, 2016

Astronomers find evidence for incredible alien technology around a distant star. The first pictures of Pluto may show something mo...Read more

Rise of the Planet Killer
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September 6, 2016 • 1h

A probe captures an image of a strange structure on Mars. Files from the first Apollo mission record an eerie sighting on the dark...Read more

A President's Close Encounter
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September 13, 2016 • 1h

Geysers are discovered on a frozen moon, and NASA redirects a probe on a daring mission to detect evidence of life. An unidentifie...Read more

The Earth Next Door
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September 20, 2016

Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery at NASA reveals a top secret mi...Read more

Curse of the Full Moon
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September 27, 2016 • 1h

Two cosmonauts fight for their lives while trapped inside a capsule in a frozen lake. A NASA scientist investigates the deadly Naz...Read more

Did Earth Have Two Moons?
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October 4, 2016 • 1h

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...Read more

Mystery of the Invisible Planet
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October 11, 2016 • 1h

A probe carrying a message to aliens malfunctions as it enters deep space. A NASA mission goes disastrously wrong when an imposter...Read more

Mars's Deepest Secret
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October 18, 2016 • 1h

British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the ISS could poison its crew with a...Read more