TV Guide National Geographic Channel Tuesday

A mystery that is worth half a billion dollars centers on a single unknown ship.

An ancient skeleton reveals the history about the settling of the Americas.

Shown is what real life was like in the Wild West, and who was left out of the story.

How Venice become a maritime superpower is shown, and what caused its downfall.

Centuries of hurricanes reveal secrets about America's past and future.

Secrets are revealed that lie beneath the waters of the world's largest coral reef.

Rock climber Alex Honnold travels to the Swiss Alps to join Bear Grylls on an adventure in which they travel through rugged valleys and climb up steep cliffs.

Actor Channing Tatum meets with Bear Grylls in Norway to take part in an adventure in the wilderness that challenges his survival skills.

Host Bear Grylls leads actor and former professional wrestler Dave Bautista on a desert expedition through parts of Glen Canyon in Arizona.

Bear Grylls leads actor Rob Riggle on an adventure through the Vatnajokull Glacier, which is located in the southeastern region of Iceland.

Actress Cara Delevingne travels to Sardinia, an Italian island in the Mediterranean Sea, where she fulfills her dream of going on an adventure with Bear Grylls.

Comic Joel McHale travels to Arizona, where he spends time with Bear Grylls in the state's desert regions and explores slot canyons.

Host Bear Grylls and actress Brie Larson travel to a remote island in the Gulf of Panama where they take part in a jungle adventure.

As fall wanes across the Arctic, the next generation of Alaskans prepare for a dark winter.

At the edge of fall, the next generation of Alaskans race to stockpile survival resources.

The next generation of Alaskans work to secure critical resources before dark winter.

As Arctic winter hits, the next generation of Alaskans rush to prepare for its wrath.

Landing on an aircraft carrier demands precision flying and is a skill vital for all Navy fighter pilots and as the students tackle the most technical section.

As the students reach the midpoint of their training, they start the iconic dogfighting phase and to pass, they must outmaneuver the enemy to take a kill shot.

The creation of the new presidential aircraft is followed, as an inside look at the manufacturing process of the new presidential jets is given.

Landing on an aircraft carrier demands precision flying and is a skill vital for all Navy fighter pilots and as the students tackle the most technical section.

As the students reach the midpoint of their training, they start the iconic dogfighting phase and to pass, they must outmaneuver the enemy to take a kill shot.

Host Bear Grylls and actress Brie Larson travel to a remote island in the Gulf of Panama where they take part in a jungle adventure.

Comic Joel McHale travels to Arizona, where he spends time with Bear Grylls in the state's desert regions and explores slot canyons.

Bear Grylls leads actor Rob Riggle on an adventure through the Vatnajokull Glacier, which is located in the southeastern region of Iceland.

Actor Channing Tatum meets with Bear Grylls in Norway to take part in an adventure in the wilderness that challenges his survival skills.

Radio personality Bobby Bones travels to Norway to embark on an adventure with Bear Grylls in which they traverse through a Norwegian fjord.