Cosmologists agree: our universe is 13.7 billion years old. Using cutting-edge technology, scientists can take a snapshot of the universe a mere heartbeat after its birth. But if the universe was born, where did it come from?

Everywhere we look on Earth, in the most hospitable environments and in the most extreme, we find life. Yet we have only ever found life on our planet. How did the stuff of stars come together to create life as we know it? What do we mean by 'life'?

Aliens almost certainly do exist. So why haven't we yet met E.T.? We're only just developing instruments powerful enough to scan for them. One astronomer believes she may have heard a hint of their first efforts to communicate.

Our understanding of the universe has drastically changed over the last 100 years. It's on the verge of another seismic shift from LHC findings. What we find could validate theories about how the world works and what we're made of.

What is the universe made of? Not just stars, planets, gas, and dust! Scientists think there must be five times as much dark matter as regular matter, but they have no idea what it is; only that it's not made of atoms we know of.

New information reveals the secret story of the Apollo 13 rescue, and how America's best minds used innovative science and engineering to save the lives of three astronauts facing life-or-death on one of NASA's most dangerous missions.

One of America's greatest achievements is also one of its most controversial. Now a team of experts investigate if there was a conspiracy to fake the moon landing, uncovering a secret report on hundreds of Nazis' involved in the Apollo space program.

Some believe the fire on Apollo 1 that killed three astronauts was a top-secret cover-up, and a team of experts investigate if this disaster was a tragic accident or part of a conspiracy to fake the moon landing.

Apollo 11's lunar module nearly killed Neil Armstrong during training. Some believe this close-call could explain a conspiracy to fake the moon landing. Experts investigate if dangers that the Apollo 11 crew faced were motive for a cover-up.

Some believe that the moon's waving American flag is the smoking gun that NASA faked the moon landing, and as a team of experts investigate this strange piece of evidence, the trail leads all the way to some of Hollywood's biggest names.

Strange flying objects have been caught on NASA’s cameras and astronauts have reported seeing UFOs. Some can be identified; others remain a mystery. We’ll reveal NASA footage and interview the astronauts and scientists.

Astronaut Leroy Chao’s spacewalk is interrupted by bright lights flying past. A flying saucer photographed from the Apollo capsule, dark shapes caught on camera shadowing the shuttle. The ideas are science fiction, but the incidents are science fact.

The Viking Lander may have found life on Mars, so why don’t we know about it? What is the most destructive force in the universe? How could a starship be seen in the Aurora Borealis? And what are NASA’s mysterious Moon Pigeons?

A chunk of the sun appears to have vanished. An ominous dark craft beneath the Space Shuttle Endeavour. Hubble spots thousands of unidentified objects traveling faster than light. Are we being watched?

A distant planet shows evidence of an Earth-like atmosphere, while a mysterious light suggests an atmosphere on the Moon. Have we found evidence of a crashed alien ship in the asteroid belt? Why are there "blueberries" on Mars?

Could spaceships be powered by atomic bombs? Can artificial rings encircle an entire star? why was Neil Armstrong’s transmission feed cut off when he spotted strange lights on the Moon? And how can lightning talk to itself?