TV Guide Science Monday

Archaeologist Ciprian Ardlean unearths fresh evidence that is transforming the understanding of when and who the earliest humans traveled to the Americas.

Experts discuss the Nazca Lines, which are mysterious, alien-looking symbols carved into a remote desert more than a thousand years ago.

Cutting-edge forensic technology reveals the dark secrets of the Iceman, which is the world's oldest and most perfectly preserved mummy.

The lost underground chambers of the formidable Maya city of Palenque are explored to give insight into the region's history and the truth about its queens.

Archaeologists study the remains of the legendary coliseums to find answers about the past and the grisly performances of athleticism and death held there.

Astronaut Leroy Chao's experience in space, the Apollo capsule's pictures of a flying saucer and shadows caught on film following the shuttle are featured.

The possibility of life on Mars as discovered by the Viking Lander, a Starship sighted in the Aurora Borealis and Moon Pigeons are featured.

Two astronauts who are stuck in the vacuum of space accept their deaths; the first detailed images of Pluto show an alien landscape.

Determining the age of the universe continues to be an elusive endeavor for scientists as their results are conflicting, and everything known could be wrong.

Experts explore how the Earth has teetered on the verge of destruction, and how chaos and catastrophe may be vital ingredients for a living planet.

The secret construction of a gigantic nuclear bunker, which remained concealed under a West Virginia hotel for decades, is investigated by experts.

Experts explore a 9,000-foot tunnel system that was built into an abandoned quarry by an eccentric millionaire centuries ago for an unknown reason.

Treasure hunters attempt to find a long-lost mine that's rumored to be hidden deep inside a remote mountain that holds a precious mineral.

A hidden city built within the Rock of Gibraltar is spotlighted, and experts explain how the immense fortress was used to control the seas during World War II.

More than three miles of secret tunnels are hidden beneath Ramsgate, England, which are part of a bomb shelter for British citizens during WWII.

A stare-of-the-art facility works on the cutting edge of scientific research under the Black Hills of South Dakota and experts explore how and why it was built.

A group of experts examines a decommissioned missile launch facility in Kansas to find out how it was turned into a state-of-the-art survival bunker.

Josh follows the trail of the club members' incredible journeys, including the Kon-Tiki balsa raft crossing the Pacific and the lunar rover crossing the moon.

Josh Gates recounts death-defying feats at the top and bottom of the world; Edmund Hillary and Tenzing Norgay's perilous climb up Mount Everest.

Josh reveals how club members' awesome exploits inspired Hollywood films, including how a ship-cracking archaeologist became Indiana Jones.

Josh Gates revisits explorer members' heart-stopping trips into space, including Apollo 13 astronauts who brought their crippled module back to Earth.

Josh recounts a mythic Himalayan expedition to meet the Yeti, and a filmmaker's encounter with the terrifying elephant king.

Josh Gates relives history's coolest polar adventures, including Robert Peary and Matthew Henson's legendary trek to the North Pole.

Josh Gates revisits explorer members' heart-stopping trips into space, including Apollo 13 astronauts who brought their crippled module back to Earth.

Josh recounts a mythic Himalayan expedition to meet the Yeti, and a filmmaker's encounter with the terrifying elephant king.

Josh Gates relives history's coolest polar adventures, including Robert Peary and Matthew Henson's legendary trek to the North Pole.

Josh reveals how club members' awesome exploits inspired Hollywood films, including how a ship-cracking archaeologist became Indiana Jones.

A stare-of-the-art facility works on the cutting edge of scientific research under the Black Hills of South Dakota and experts explore how and why it was built.

A group of experts examines a decommissioned missile launch facility in Kansas to find out how it was turned into a state-of-the-art survival bunker.