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Travel Channel HD

The exciting new Travel Channel invites viewers to explore the people, places and cultures of our world. Programming includes first-class travel documentaries, adventure excursions, international cuisine and travel tips.

Travel Channel

Soviet photos of the moon are intercepted by the CIA; a malfunction aboard the ISS, which imperils the whole crew; NASA probe finds evidence of the possibility of life on Mars.

NASA's Unexplained Files

Mars's Deepest Secret

From the smallest cell to the solar system, Science HD is an odyssey of scientific facts, investigations and breakthroughs.

Science HD

A probe malfunctions without cause as it enters deep space; a mission goes astray when an imposter breaches Mission Control; evidence of an invisible planet within the Solar System.

Mystery of the Invisible Planet

A theory of Earth's abiogenesis may have started in the clouds of Venus; a look into the claim of Earth having two moons; a NASA scientist helps the FBI solve the 1996 Olympic bombing.

Did Earth Have Two Moons?

Cosmonauts are trapped in a capsule in a frozen lake; a NASA scientist investigates the Hindenburg; the full moon affects experiments.

Curse of the Full Moon

Astronomers notice a planet in Earth's vicinity capable of supporting life; top secret military program exposed; the moon contains the components to start life.

The Earth Next Door

The discovery of geysers on a moon; NASA's mission to detect life; an object is spotted approaching an asteroid.

A President's Close Encounter

A mars mission captures an image of a strange structure on the planet; an intriguing sight on the dark side of the moon; a planet-eating star gives scientists a peek of Earth's bleak future.

Rise of the Planet Killer

Evidence of alien technology around a distant star; speculation about Pluto's surface; Apollo astronauts are at a loss of words to describe an object they encountered while they approached the moon.

Pluto's Stranger Things

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Some things are better left to science for an explanation.

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From the smallest cell to the solar system, Science is an odyssey of scientific facts, investigations and breakthroughs.

S4 E4 | The Earth Next Door