National Geographic HD

Hazen Audel tackles the highlands in an epic Amazon survival challenge.

Hazen Audel faces soaring waterfalls in an epic Amazon survival challenge.

The act of sabotage is one of the most effective weapons in any arsenal. Direct attacks, advanced weaponry and the element of surprise have sent many ships to their final resting place on the seafloor.

War, weather and human error have led to some of the worst maritime disasters in US history. But imagine if we could empty the oceans, letting the water drain away to reveal these secrets.

Eyewitness accounts testify how climate change and rising tides are increasing the odds that the small island of Tuvalu will soon be completely submerged under the Pacific.

A discovery of the science behind the fails and falls of electric scooters. Plus, a look at the dynamics of jumping on hay bales and how to make a homemade zipwire.

Dallas checks out calamitous clips as he reveals how easy it is to get injured in an off-road buggie, the hazards of swing seats and the humiliating consequence of cart-wheeling.

Gary Muehlberger works to fall a massive tree to restock his firewood as winter approaches. The members of the Port Protection community reflect on their symbiotic relationship with nature.

Stuart Andrews is forced to harvest a forest giant to ensure his warmth in the coming months. The residents of Port Protection do whatever they can to brace themselves against the upcoming winter months.

Residents of Port Protection must complete vital tasks before winter, and they must often enlist the help of family or friends.

Tim and Fuzz are taking on a 1984 Opel Manta GTE owned by former amateur rally driver, Alan. Alan's family hope that a fully restored car will help bring him out of his shell.

Tim and Fuzz take on carpenter Mike's 1980 Ford Escort RS2000. After his son's road accident, Mike's family want to repay his selfless devotion and give him the `Car SOS' treatment.

Tim and Fuzz are taking on a 1992 Saab 900 Turbo that belongs to former electrical engineer Pravesh, who has recently fallen ill.

Tim and Fuzz take on a 1993 Toyota Supra Mk 4 owned by former competitive motorcycle racer Lisa, who, after a road accident, is no longer able to ride her beloved bikes.

A bellowing bloated calf, an abandoned pit bull, sore husky pups and even a beloved mother cat suffering a serious blow.

A cow with a foot problem. A treatment that could kill a down cow. A Shih Tzu with a bulging eye.

When peat diggers discover a human head near Silkeborg in Denmark, the police think it is a missing boy. They soon notice that the body is much older than they thought.

Meeting four women who ruled, each with her own path to power. For women, taking the throne in ancient Egypt required strategy, courage and determination.

A terrifying tale of demonic possession in a witch trial in Ireland.

In 79 AD, the eruption of a nearby volcano, Mount Vesuvius, buried Pompeii in millions of tonnes of ash and debris. Now, archaeologists are working to uncover the dark side of this idyllic Roman city by finding the room of an enslaved person.

The mysteries of Tutankhamun are unlocked, and archaeologists find a tomb of importance.

Meeting four women who ruled, each with her own path to power. For women, taking the throne in ancient Egypt required strategy, courage and determination.

A terrifying tale of demonic possession in a witch trial in Ireland.

In 79 AD, the eruption of a nearby volcano, Mount Vesuvius, buried Pompeii in millions of tonnes of ash and debris. Now, archaeologists are working to uncover the dark side of this idyllic Roman city by finding the room of an enslaved person.

The mysteries of Tutankhamun are unlocked, and archaeologists find a tomb of importance.

Tim and Fuzz are taking on a 1984 Opel Manta GTE owned by former amateur rally driver, Alan. Alan's family hope that a fully restored car will help bring him out of his shell.

Tim and Fuzz take on carpenter Mike's 1980 Ford Escort RS2000. After his son's road accident, Mike's family want to repay his selfless devotion and give him the `Car SOS' treatment.

Tim and Fuzz are taking on a 1992 Saab 900 Turbo that belongs to former electrical engineer Pravesh, who has recently fallen ill.

Tim and Fuzz take on a 1993 Toyota Supra Mk 4 owned by former competitive motorcycle racer Lisa, who, after a road accident, is no longer able to ride her beloved bikes.

A discovery of the science behind the fails and falls of electric scooters. Plus, a look at the dynamics of jumping on hay bales and how to make a homemade zipwire.

John Ryan, owner of Shamrock Salvage & Towing, has met his match when confronted with a 27-metre rusted-out, sunken barge trashing a local beach.