Nasa's Unexplained Files

A Nasa scientist explains his theory that a mysterious lunar material caused a Chinese moon rover to break down, and interfered with an Apollo mission decades earlier

Official documents shed light on NASA's secret 'plan B', put in place in case the first moon landing failed, and the Cassini mission unravels a 300-year-old mystery

Official documents shed light on NASA's secret 'plan B', put in place in case the first moon landing failed, and the Cassini mission unravels a 300-year-old mystery

Scientists explain why hotter than expected temperatures of Jupiter have left them baffled. Plus, detectives asks Nasa for help in solving a murder cold case

Scientists explain why hotter than expected temperatures of Jupiter have left them baffled. Plus, detectives asks Nasa for help in solving a murder cold case

Experts investigate if a nearby exoplanet could be the home to an alien civilisation after a new discovery confirms that life can thrive on such a world

An investigation into a strange discovery made by the Mars Curiosity rover, which could suggest an alien nuclear war took place there more than 300 million years ago

Experts investigate if a nearby exoplanet could be the home to an alien civilisation after a new discovery confirms that life can thrive on such a world

An investigation into a strange discovery made by the Mars Curiosity rover, which could suggest an alien nuclear war took place there more than 300 million years ago

Scientists explain why hotter than expected temperatures of Jupiter have left them baffled. Plus, detectives asks Nasa for help in solving a murder cold case

Scientists explain why hotter than expected temperatures of Jupiter have left them baffled. Plus, detectives asks Nasa for help in solving a murder cold case

Experts shed light on the mystery of why two suns seemed to appear in the skies over Indonesia, prompting rumours of the existence of a 'dark twin' of Earth's life-bringing star

Experts shed light on the mystery of why two suns seemed to appear in the skies over Indonesia, prompting rumours of the existence of a 'dark twin' of Earth's life-bringing star

Experts shed light on the mystery of why two suns seemed to appear in the skies over Indonesia, prompting rumours of the existence of a 'dark twin' of Earth's life-bringing star

Experts shed light on the mystery of why two suns seemed to appear in the skies over Indonesia, prompting rumours of the existence of a 'dark twin' of Earth's life-bringing star

Geologists begin to ask questions about 'alien' deposits found on the Earth's surface - and the answer could shed light on the cause of history's greatest extinction event

Geologists begin to ask questions about 'alien' deposits found on the Earth's surface - and the answer could shed light on the cause of history's greatest extinction event

Geologists begin to ask questions about 'alien' deposits found on the Earth's surface - and the answer could shed light on the cause of history's greatest extinction event

Geologists begin to ask questions about 'alien' deposits found on the Earth's surface - and the answer could shed light on the cause of history's greatest extinction event

Apollo 12 astronauts bring back something alive from the moon and Nasa track an asteroid heading towards Earth only to make a shocking discovery

A NASA probe captures an image of a familiar structure on the surface of Mars. What made 'Mars Henge'? Plus, how did an Apollo astronaut get sick on the moon?

Apollo 12 astronauts bring back something alive from the moon and Nasa track an asteroid heading towards Earth only to make a shocking discovery

A NASA probe captures an image of a familiar structure on the surface of Mars. What made 'Mars Henge'? Plus, how did an Apollo astronaut get sick on the moon?

A NASA probe captures an image of a familiar structure on the surface of Mars. What made 'Mars Henge'? Plus, how did an Apollo astronaut get sick on the moon?

A NASA probe captures an image of a familiar structure on the surface of Mars. What made 'Mars Henge'? Plus, how did an Apollo astronaut get sick on the moon?

An Apollo 17 photo seems to show a US military outpost on the moon and an investigation into whether there is life in the oceans of Jupiter's moons

A Nasa scientist explains his theory that a mysterious lunar material caused a Chinese moon rover to break down, and interfered with an Apollo mission decades earlier

An Apollo 17 photo seems to show a US military outpost on the moon and an investigation into whether there is life in the oceans of Jupiter's moons

A Nasa scientist explains his theory that a mysterious lunar material caused a Chinese moon rover to break down, and interfered with an Apollo mission decades earlier

How as the Soviet Union unveiled its own space shuttle, the CIA hatched a revenge plot. Plus, a missing nuclear weapon that could threaten a Nasa base in the Arctic

How as the Soviet Union unveiled its own space shuttle, the CIA hatched a revenge plot. Plus, a missing nuclear weapon that could threaten a Nasa base in the Arctic

How as the Soviet Union unveiled its own space shuttle, the CIA hatched a revenge plot. Plus, a missing nuclear weapon that could threaten a Nasa base in the Arctic

How as the Soviet Union unveiled its own space shuttle, the CIA hatched a revenge plot. Plus, a missing nuclear weapon that could threaten a Nasa base in the Arctic

Official documents shed light on NASA's secret 'plan B', put in place in case the first moon landing failed, and the Cassini mission unravels a 300-year-old mystery

Official documents shed light on NASA's secret 'plan B', put in place in case the first moon landing failed, and the Cassini mission unravels a 300-year-old mystery

Declassified files detail how three cosmonauts died in mysterious circumstances while re-entering Earth's atmosphere. Plus, a Nasa rover discovers clues that help solve a murder

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Declassified files detail how three cosmonauts died in mysterious circumstances while re-entering Earth's atmosphere. Plus, a Nasa rover discovers clues that help solve a murder

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Declassified files detail how three cosmonauts died in mysterious circumstances while re-entering Earth's atmosphere. Plus, a Nasa rover discovers clues that help solve a murder

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Declassified files detail how three cosmonauts died in mysterious circumstances while re-entering Earth's atmosphere. Plus, a Nasa rover discovers clues that help solve a murder

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Official documents shed light on NASA's secret 'plan B', put in place in case the first moon landing failed, and the Cassini mission unravels a 300-year-old mystery

Official documents shed light on NASA's secret 'plan B', put in place in case the first moon landing failed, and the Cassini mission unravels a 300-year-old mystery

Declassified files detail how three cosmonauts died in mysterious circumstances while re-entering Earth's atmosphere. Plus, a Nasa rover discovers clues that help solve a murder

The last humans to walk on the Moon discovered something strange on the lunar surface. Plus, a Nasa scientist investigates a strange phenomenon

Declassified files detail how three cosmonauts died in mysterious circumstances while re-entering Earth's atmosphere. Plus, a Nasa rover discovers clues that help solve a murder

The last humans to walk on the Moon discovered something strange on the lunar surface. Plus, a Nasa scientist investigates a strange phenomenon

Former astronaut Neil Armstrong's expedition into the Amazon, seeking a library said to hold all knowledge of an advanced alien civilisation

Former astronaut Neil Armstrong's expedition into the Amazon, seeking a library said to hold all knowledge of an advanced alien civilisation

Experts examine the possibilities of making alien contact as they look back at an experiment Nasa embarked on as they attempted to communicate with dolphins

Experts examine the possibilities of making alien contact as they look back at an experiment Nasa embarked on as they attempted to communicate with dolphins

The last humans to walk on the Moon discovered something strange on the lunar surface. Plus, a Nasa scientist investigates a strange phenomenon

The last humans to walk on the Moon discovered something strange on the lunar surface. Plus, a Nasa scientist investigates a strange phenomenon

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Astronauts evacuate when a strange mystery object is spotted hurtling through space toward the ISS. Plus, a secret agent tries to recover missing moon rocks

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Astronauts evacuate when a strange mystery object is spotted hurtling through space toward the ISS. Plus, a secret agent tries to recover missing moon rocks

A Nasa spacecraft suffers a malfunction in orbit - can its lone astronaut make it back to Earth? Plus, new evidence emerges over Yuri Gagarin's mysterious death

A Nasa spacecraft suffers a malfunction in orbit - can its lone astronaut make it back to Earth? Plus, new evidence emerges over Yuri Gagarin's mysterious death

A Nasa spacecraft suffers a malfunction in orbit - can its lone astronaut make it back to Earth? Plus, new evidence emerges over Yuri Gagarin's mysterious death

Experts investigate a mysterious object that the New Horizons spacecraft encountered, and which shut down the probe's computers

Experts investigate a mysterious object that the New Horizons spacecraft encountered, and which shut down the probe's computers

Experts investigate a mysterious object that the New Horizons spacecraft encountered, and which shut down the probe's computers

Experts investigate a mysterious object that the New Horizons spacecraft encountered, and which shut down the probe's computers

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger it poses to Earth

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger it poses to Earth

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger it poses to Earth

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger it poses to Earth

Experts investigate whether the Roswell UFO incident was a Soviet conspiracy masterminded by Stalin, or if the story may be another cover-up

Experts investigate whether the Roswell UFO incident was a Soviet conspiracy masterminded by Stalin, or if the story may be another cover-up

Experts investigate whether the Roswell UFO incident was a Soviet conspiracy masterminded by Stalin, or if the story may be another cover-up

Experts investigate whether the Roswell UFO incident was a Soviet conspiracy masterminded by Stalin, or if the story may be another cover-up

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Declassified files illustrate how two astronauts trapped in the vacuum of space faced an agonising death. Plus, close-up images of Pluto reveal a distinctly alien landscape

Astronauts evacuate when a strange mystery object is spotted hurtling through space toward the ISS. Plus, a secret agent tries to recover missing moon rocks

Did Apollo astronauts hear unexplained transmissions on the far side of the moon? Plus, an astronomer spots a strange disturbance in Martian atmosphere

Astronauts evacuate when a strange mystery object is spotted hurtling through space toward the ISS. Plus, a secret agent tries to recover missing moon rocks

Did Apollo astronauts hear unexplained transmissions on the far side of the moon? Plus, an astronomer spots a strange disturbance in Martian atmosphere