TV Guide Science Tuesday

Stel and Jess visit archeological sites along the Adriatic coast of Croatia, where underwater relics from a bridge system take them to a city and sinkhole.

Stel and Jess find a trail of destruction back to the time of Atlantis while exploring Europe's largest active volcano, which leads them to a hidden labyrinth.

In Turkey, Stel and Jess investigate an advanced civilization's cave paintings and discover a shifted shoreline and ruins of a lost city.

Stel and Jess investigate a Greek island, where some believe an ancient civilization built an enormous marble pyramid, and artifacts there lead them to Turkey.

Experts explore a shipwreck discovered at the bottom of Lake Erie that could be the oldest wreck in America's most notorious ship graveyard.

Experts investigate the sinking of a sister ship of the Titanic that got embroiled in war with a hidden enemy, resulting in the former luxury vessel's sinking.

Some of Mother Nature's most amazing moments are spotlighted, including a man eaten alive by leaches, a rainbow at night and more.

A rookie bot called End Game and former BattleBots, champ Bite Force, take one another on during an epic, action-packed night of fighting.

Witch Doctor and Yeti battle in a world-class brawl as top competitors fight in an attempt to earn their place in the postseason tournament.

New discoveries about interstellar space, which is the space between stars, reveal that it's not empty and unremarkable as previously thought.

New discoveries force astronomers to question if the Big Bang really happened, and they investigate if the Big Bang wasn't just the start of Earth's universe.

Experts examine a temple that was buried after it was declared to be cursed and learn what happened at this site dedicated to the Roman god of the underworld.

Experts investigate an ancient sacrifice after finding a 500-year-old grave, and they pay special attention to the red human skulls found at the site.

After unearthing mutilated skeletons in Mexico, experts examine a case of mass murder from ancient times by using advanced forensic analysis.

Archeologists discover the mummified bodies of three children in the mountains of Argentina, so they use the latest technology to learn about their deaths.

Researchers learn about a dark period of English history after they decode ancient markings found by a team of explorers inside a cave system.

Investigators rely on new technology to examine a mass grave of mutilated skeletons discovered at the frontier of the ancient Roman Empire.

Archeologists uncover an ancient red skeleton at a Mayan site and notice that the skeleton was carefully decorated with precious treasures.

When a mysterious fog appears at the same time a large explosion strikes, some think it's a napalm attack, but experts find the truth could be more dangerous.

When a river of blood washes through a city's streets, witnesses fear doomsday; a perfect circle in the clouds above California could be evidence of aliens.

A locomotive shoots fire, and locals fear it's a demonic train coming to take their souls; experts wonder if they've found a modern-day leviathan.

When a ghostly figure is caught on tape stalking people in Japan, some fear it could be a horrifying local legend; a flame appears in the Norwegian wilderness.

Near Area 51, a police convoy is filmed transporting a strange craft in the middle of the night; strange beams of light are reported in Argentina.

When a park is taken over by a large spider web, experts investigate if this monster's trap could entangle a human; a tree is seen spewing thick red blood.

When a ghostly figure is caught on tape stalking people in Japan, some fear it could be a horrifying local legend; a flame appears in the Norwegian wilderness.

Near Area 51, a police convoy is filmed transporting a strange craft in the middle of the night; strange beams of light are reported in Argentina.

When a park is taken over by a large spider web, experts investigate if this monster's trap could entangle a human; a tree is seen spewing thick red blood.

A locomotive shoots fire, and locals fear it's a demonic train coming to take their souls; experts wonder if they've found a modern-day leviathan.

Investigators rely on new technology to examine a mass grave of mutilated skeletons discovered at the frontier of the ancient Roman Empire.

Archeologists uncover an ancient red skeleton at a Mayan site and notice that the skeleton was carefully decorated with precious treasures.