Science Channel HD

Josh Gates explores daring journeys, including the Kon-Tiki balsa raft crossing the Pacific, NASA's lunar rover making tracks on the moon and an airplane flying around the world without the use of fuel.

Josh Gates explores how club members' swashbuckling exploits inspired Hollywood; a bullwhip-cracking archaeologist may be the real-life Indiana Jones; a Nazi mountaineer's life-changing "Seven Years in Tibet" became a Brad Pitt star turn.

Josh Gates boldly explores members' most heart-pounding journeys into space; Apollo 13 astronauts fight to bring their crippled spacecraft 238,000 miles back to Earth and futuristic SpaceShipOne could give others a chance to travel to space.

Josh Gates recounts the death-defying exploits of Edmund Hillary and Tenzing Norgay, who summit Mount Everest; two submariners plunge seven miles under the Pacific; a pilot skydives from the edge of space.

A strange cave freezes in the summer and melts in the winter; a massive sand dune swallows a small child in an instant.

A massive supervolcano beneath Naples, Italy, may be on the verge of erupting again, which could have apocalyptic consequences across the planet; Rob Nelson and Stefan Burns use cutting-edge technology to investigate this disturbing new evidence.

Three cosmonauts mysteriously die as they re-enter Earth's atmosphere and NASA needs to know why; a declassified document shows a CIA plan to use a space disaster as a cover to start World War 3.

Two astronauts trapped in the vacuum of space face a horrible death; the first close up images of Pluto show an alien landscape; residents of Houston struggle to explain videos of unidentified flying lights captured above their city at night.

Spaceships powered by atomic bombs; artificial rings encircle an entire star; Neil Armstrong's transmission feed cuts off when he spots strange lights on the moon; how can lightning talk to itself.

Scientists have discovered a mysterious ninth planet ten times the size of Earth on the very edge of the solar system; this strange world could have moons with extraterrestrial life.

Recent evidence could explain how supermassive black holes grow so big; neither dark matter nor cannibalism can fully explain these beasts, but the latest science may finally provide an answer.

An unearthly presence at a nuclear launch site in Cyprus visits a UN peacekeeper and helps him fight off a deadly enemy.

A Russian soldier describes being lured into a swamp by an unnatural entity; an Ohio military base with a UFO connection; an interview with a US Air Force colonel whose alien-craft sightings are finally confirmed.

U.N. Peacekeeper develops a mysterious power to fight off a deadly foe.

An unknown presence pulls an Armed Forces officer into a living nightmare.

A Navy seaman experiences strange events in the heart of the Bermuda Triangle; an Air Force Staff Sergeant is confronted by an otherworldly being in Iraq; a tech sergeant discovers a haunting visitor in her air base house.

A Russian Infantryman fights an unknown presence in a Chechnyan forest.

An intelligence analyst on a secret mission makes an unearthly discovery.

When a U.S. Air Force intercept aircraft chases after a UFO, it vanishes forever without a trace; a new investigation tries to uncover what caused this mysterious disappearance.

Experts use cutting-edge technology to investigate a mysterious phenomenon at the tomb of a 3,000-year-old Egyptian pharaoh.

When a powerful radio beam originating from deep space is detected by experts on Earth, some suspect it's hard evidence of extraterrestrial life; new investigations into this shocking signal might reveal the truth.

When two experts build their own radio-listening station to intercept the secret communications of American and Soviet astronauts, they capture traces of a haunting voice that may be a lost Russian cosmonaut.

When someone picks up a radio distress call from a seven-year-old boy lost alone in the desert, authorities embark on a search-and-rescue mission to find him; as the hunt continues, the case becomes more and more mysterious.

A Russian radio station has broadcast a signal nonstop since the Cold War, and no one knows why; experts use hi-tech methods to investigate what it is and what might happen if it ever stops.

When two experts build their own radio-listening station to intercept the secret communications of American and Soviet astronauts, they capture traces of a haunting voice that may be a lost Russian cosmonaut.