TV Guide Science Tuesday

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.

A look is taken at spaceships powered by A-bombs, fake rings around a star, an incomplete transmission from the moon and lightning that talks to itself.

A disappearing piece of the sun, a dark vessel appearing below the Shuttle Endeavor and thousands of unidentified objects captured by Hubble are presented.

A far-off planet that could have an atmosphere similar to Earth's, an inexplicable glowing light from the moon and why Mars has blueberries are featured.

Robots roam the Martian surface on a mission to uncover its secrets; Perseverance joins this dedicated group of machines to uncover life on the Red Planet.

The search for Dark Matter eludes scientists today; physicists have developed dozens of theories to determine if this mysterious substance could exist.

Experts investigate and uncover a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong in India.

Experts investigate and uncover a secret World War II Nazi complex that is linked to a weapons technology that may have been discovered by the Russians.

Experts investigate and uncover a bizarre area of perilous waters in the Black Sea that is linked to a history of Bermuda Triangle-like sinkings.

Experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

A strange cube spins through the skies over Missouri; experts investigate footage released by the Pentagon that confirms the existence of these ominous objects.

New evidence and modern-day sightings of UFOs have experts thinking that Native American myths and legends of Star People may have existed on Earth.

Investigators reveal the secret connection to the UFO phenomenon and several U.S. Presidents, including FDR, Truman, Eisenhower and the Kennedy assassination.

UFO researchers investigate what really happened during some of the most incredible and sometimes life-threatening encounters between law enforcement and UFOs.

UFO experts investigate the legend of the lost city of gold called El Dorado, and whether ancient civilizations traded gold for extraterrestrial knowledge.

With recent technological breakthroughs such as artificial intelligence and lasers, evidence suggests that these advances are the result of contact with UFOs.

Recent news of the Pentagon's secret UFO program may reveal shocking evidence of what the U.S. military has known for decades about UFO sightings.

The phenomena of alien abduction are investigated, along with the alleged alien implants that are sometimes left behind in several victims are examined.

New evidence suggests that the holiest religious sites in the world have been deemed sacred because of contact with interstellar travelers in the distant past.

Recent news of the Pentagon's secret UFO program may reveal shocking evidence of what the U.S. military has known for decades about UFO sightings.

The phenomena of alien abduction are investigated, along with the alleged alien implants that are sometimes left behind in several victims are examined.

New evidence suggests that the holiest religious sites in the world have been deemed sacred because of contact with interstellar travelers in the distant past.

With recent technological breakthroughs such as artificial intelligence and lasers, evidence suggests that these advances are the result of contact with UFOs.

New evidence and modern-day sightings of UFOs have experts thinking that Native American myths and legends of Star People may have existed on Earth.

Investigators reveal the secret connection to the UFO phenomenon and several U.S. Presidents, including FDR, Truman, Eisenhower and the Kennedy assassination.