
NASA's Unexplained Files
A theory of Earth's abiogenesis may have started in the clouds of Venus.

A theory of Earth's abiogenesis may have started in the clouds of Venus.

Cosmonauts are trapped in a capsule in a frozen lake; a NASA scientist investigates the Hindenburg.

Astronomers notice a planet in Earth's vicinity capable of supporting life.

The discovery of geysers on a moon; NASA's mission to detect life.

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

Evidence of alien technology around a distant star; speculation about Pluto's surface.

NASA tracks an asteroid heading towards Earth but make an incredible discovery.

Lost tapes show that Apollo astronauts heard unexplained transmissions on the far side of the moon.

Two astronauts trapped in the vacuum of space face a horrible death.

The Rosetta spacecraft discovers a comet that appears to be singing.

Astronauts evacuate when a mystery object hurtles toward the International Space Station.

Recently discovered documents show NASA's secret plan B for failure of the first moon landing.

Three cosmonauts mysteriously die as they re-enter Earth's atmosphere and NASA needs to know why.

An Apollo 17 photo seems to show a US military outpost on the Moon.

Looking at how the comet of the century looks like an alien spacecraft.

New evidence could finally reveal the truth behind the mystery of the face on Mars.

Images of Mercury show spider-like formations; A space shuttle mission almost ends in disaster.

The power of atomic bombs; artificial rings; Neil Armstrong's transmission on the moon.

The swirling gases of Saturn form a perfect hexagon that has hovered above the planet for 30 years.

A distant planet shows an Earth-like atmosphere; a glowing light suggests an atmosphere on the Moon.