NASA's Unexplained Files

E1 • Pluto's Stranger Things

Astronomers find evidence for alien technology around a distant star.

44m • 2016

Astronomers find evidence for alien technology around a distant star.

E2 • Rise of the Planet Killer

A mission to Mars captures an image of a strange structure on the planet.

44m • 2016

A mission to Mars captures an image of a strange structure on the planet.

E3 • A President's Close Encounter

Geysers are discovered on a frozen moon, and NASA detects evidence of life.

44m • 2016

Geysers are discovered on a frozen moon, and NASA detects evidence of life.

E4 • The Earth Next Door

Astronomers detect a potentially habitable planet close to Earth.

44m • 2016

Astronomers detect a potentially habitable planet close to Earth.

E5 • Curse of the Full Moon

A strange phenomenon impacts a NASA experiment during a full moon.

44m • 2016

A strange phenomenon impacts a NASA experiment during a full moon.

E6 • Did Earth Have Two Moons?

Scientists investigate an ancient claim that the earth had two moons.

44m • 2016

Scientists investigate an ancient claim that the earth had two moons.

E7 • Mysterious Invisible Planet

Astronomers discover evidence of an invisible planet orbiting a star.

44m • 2016

Astronomers discover evidence of an invisible planet orbiting a star.

E8 • Mars's Deepest Secret

The Mars Orbiter captures an image of odd streaks on the Martian surface.

44m • 2016

The Mars Orbiter captures an image of odd streaks on the Martian surface.

E1 • Pluto Under Pressure

Lost tapes show that Apollo astronauts heard unexplained transmissions.

43m • 2016

Lost tapes show that Apollo astronauts heard unexplained transmissions.

E2 • Return Of The Moon Bugs

Apollo 12 astronauts bring back something alive from the moon.

43m • 2016

Apollo 12 astronauts bring back something alive from the moon.

E3 • Rise Of The Ice Creatures

Neil Armstrong goes into an unexplained spin and must determine the cause.

43m • 2016

Neil Armstrong goes into an unexplained spin and must determine the cause.

E4 • Ghosts On A Comet

A mysterious material may have sabotaged earlier Apollo missions.

42m • 2016

A mysterious material may have sabotaged earlier Apollo missions.

E5 • The Moon That Disappeared

NASA's secret plan B for failure of the first moon landing is revealed.

43m • 2016

NASA's secret plan B for failure of the first moon landing is revealed.

E6 • Curse Of The Red Planet

Three cosmonauts die mysteriously as they re-enter Earth's atmosphere.

43m • 2016

Three cosmonauts die mysteriously as they re-enter Earth's atmosphere.

E7 • Red Storm Rising

Two astronauts trapped in the vacuum of space face an agonizing death.

43m • 2016

Two astronauts trapped in the vacuum of space face an agonizing death.

E8 • Attack Of The Thunderballs

Astronauts are evacuated when a mystery object hurtles towards the ISS.

43m • 2016

Astronauts are evacuated when a mystery object hurtles towards the ISS.

E1 • JFK UFO Conspiracy

President Kennedy demanded that the CIA share their UFO data with NASA.

44m • 2019

President Kennedy demanded that the CIA share their UFO data with NASA.

E2 • Curse of the Gas Giant

The Curiosity Rover finds a strange, and perhaps sinister, object on Mars.

44m • 2019

The Curiosity Rover finds a strange, and perhaps sinister, object on Mars.

E3 • The Sun's Evil Twin

Two suns photographed in the sky may be a sighting of our sun's evil twin.

44m • 2019

Two suns photographed in the sky may be a sighting of our sun's evil twin.

E4 • Secret Aliens

Scientists examine strange octopus DNA to see if it could be alien.

44m • 2019

Scientists examine strange octopus DNA to see if it could be alien.

E5 • Stonehenge on Mars

NASA investigates what could have made a Stonehenge-like structure on Mars.

44m • 2019

NASA investigates what could have made a Stonehenge-like structure on Mars.

E6 • CIA's Secret Revenge

The CIA plans revenge when the Soviet Union unveils its own space shuttle.

44m • 2019

The CIA plans revenge when the Soviet Union unveils its own space shuttle.

E7 • The Moon's Strange Secret

The last humans on the Moon discover something strange on the surface.

44m • 2019

The last humans on the Moon discover something strange on the surface.

E8 • Saturn's Death Star

A mysterious object orbiting Saturn looks just like the Death Star.

44m • 2019

A mysterious object orbiting Saturn looks just like the Death Star.

E1 • Saturn's Moon Monsters

NASA discovers something strange on Saturn's moon that might be aliens.

44m • 2020

NASA discovers something strange on Saturn's moon that might be aliens.

E2 • Aliens vs. Stalin at Area 51

An Area 51 insider claims the Roswell incident was a Soviet conspiracy.

44m • 2020

An Area 51 insider claims the Roswell incident was a Soviet conspiracy.

E3 • The Black Hole Next Door

Astronomers investigate how much danger a rogue black hole poses to Earth.

44m • 2020

Astronomers investigate how much danger a rogue black hole poses to Earth.

E4 • Pluto's Evil Twin

Experts investigate if a mysterious object is an alien spacecraft.

44m • 2020

Experts investigate if a mysterious object is an alien spacecraft.

E5 • Aliens in the Amazon

Experts ask why Neil Armstrong went on a quest to find a legendary library.

44m • 2020

Experts ask why Neil Armstrong went on a quest to find a legendary library.

E6 • Secrets of the Alien Signals

Experts ask if an experiment with dolphins is a prelude to alien contact.

43m • 2020

Experts ask if an experiment with dolphins is a prelude to alien contact.

E7 • Planet of the Metal Aliens

Experts investigate if a nearby exoplanet could be inhabited by aliens.

43m • 2020

Experts investigate if a nearby exoplanet could be inhabited by aliens.

E8 • Did Aliens Nuke Mars?

Experts consider if an alien Armageddon transformed Mars into a wasteland.

44m • 2020

Experts consider if an alien Armageddon transformed Mars into a wasteland.