Strange flying objects have been caught on NASA’s cameras and astronauts have reported seeing UFOs....

Astronaut Leroy Chao’s spacewalk is interrupted by bright lights flying past. A flying saucer photog...

The Viking Lander may have found life on Mars, so why don’t we know about it? What is the most dest...

A chunk of the sun appears to have vanished. An ominous dark craft beneath the Space Shuttle Endeavo...

A distant planet shows evidence of an Earth-like atmosphere, while a mysterious light suggests an at...

Could spaceships be powered by atomic bombs? Can artificial rings encircle an entire star? why was...

What could make a NASA astronaut report seeing a flying saucer in the skies above a US Air Force tes...

A UFO crashes in Pennsylvania. Was it a secret Soviet satellite or something far more dangerous? On...

Was the Moon landing faked? Images of Mercury reveal massive spider-like formations on its surface....

Are burning lights above Nevada and Utah signs of a secret space weapons project? What are the odd t...

How could an astronaut on a spacewalk begin to drown? Have NASA scientists discovered an asteroid th...

Could NASA be responsible for a nuclear explosion on Jupiter? Could new evidence finally solve the m...

A Russian probe discovers the lunar soil was disturbed before the US or USSR got there. Did Nazis ar...

How did pictures from the Hubble telescope make the comet of the century look like an alien spacecra...

Something in space is attacking the brains of astronauts. What is it? Should NASA be worried about t...

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

Apollo 12 astronauts bring back something alive from the moon and NASA track an asteroid heading tow...

Neil Armstrong goes into an unexplained spin. He needs to figure out what’s causing it, or he faces...

When a Chinese moon rover breaks down, a NASA scientist points to a mysterious material that seemed...

Recently discovered documents reveal NASA's secret plan B for failure of the first moon landing, a S...

Three cosmonauts die mysteriously as they re-enter Earth's atmosphere. A declassified document revea...

Two astronauts trapped in the vacuum of space face an agonizing death; the first close up images of...

Astronauts are evacuated when a mystery object is discovered hurtling towards the ISS, a NASA secret...

Astronomers find evidence for incredible alien technology around a distant star. The first pictures...

A probe captures an image of a strange structure on Mars. Files from the first Apollo mission record...

Geysers are discovered on a frozen moon, and NASA redirects a probe on a daring mission to detect ev...

Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery a...

Two cosmonauts fight for their lives while trapped inside a capsule in a frozen lake. A NASA scienti...

A discovery suggests the hellish clouds of Venus may be the origin of life on Earth. A bizarre sight...

A probe carrying a message to aliens malfunctions as it enters deep space. A NASA mission goes disas...

British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the IS...

A declassified letter written by President Kennedy demands the CIA share its UFO data with NASA. A b...

Jupiter is far hotter than it should be, and scientists don't understand why. The Curiosity Rover fi...

Two suns are photographed in the Indonesia sky -- a trick of the light or a sighting of our Sun's ev...

An astronomer records an unusual signal from a distant star. FBI agents find classified documents at...

When NASA spots a something on Mars that resembles Stonehenge, they investigate what could have made...

When the Soviet Union unveils its own space shuttle, the CIA hatches a secret revenge plot. Recent d...

The last humans to walk on the Moon discover something strange on the surface. A NASA scientist inve...

A mysterious object is orbiting Saturn, and it looks just like the Death Star. New evidence might sh...

When NASA discovers something strange on Saturn's biggest moon, experts investigate if aliens feedin...

When a former Area 51 insider alleges that the Roswell UFO incident was a nefarious Soviet conspirac...

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how mu...

After NASA's New Horizons spacecraft flies by Pluto, it encounters a strange alien world that shuts...

After Neil Armstrong's moonwalk, he led an expedition to the Amazon to find a legendary library that...

When NASA begins a strange experiment to communicate with dolphins, experts investigate if it's a pr...

Experts investigate if a nearby exoplanet could be the home to a alien civilization of strange, meta...

A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nucl...