National Geographic (Canada)

A spate of bites hits Long Island, N.Y., after 40 years; with sand tiger sharks likely responsible, Diva Amon dives with them to find answers.

Diva uncovers a mysterious cluster of shark bites in California; but these bites are in the winter when the sharks are usually long gone; to understand the reasons behind this cluster of encounters, the team gets to work.

The doctors solve a pigeon's mystery mass and find a foreign object inside a ferret.

Dr. K must act quick and perform emergency surgery on a tortoise crushed by a car.

A binge-eating pig learns that what goes down, must come up; a toothache sends Dr. T down a rabbit hole; a stubborn egg sends a sick chick to the hospital.

A macaw with a mysterious mass has Dr. K going beyond the call of duty; Dr. T gets a visit from a tiny tortoise who lost a fight with a pit bull puppy.

Scooter and Muskie Todd split from the convoy and blast deeper into the wilderness, where Scooter's truck vanishes into a drift left by a recent blizzard; Bill sends reinforcements as Todd and Lisa battle to complete their mission.

An avalanche risk forces a bombing mission above the Klondike Highway.

Scooter and Muskie Todd split from the convoy and blast deeper into the wilderness, where Scooter's truck vanishes into a drift left by a recent blizzard; Bill sends reinforcements as Todd and Lisa battle to complete their mission.

An avalanche risk forces a bombing mission above the Klondike Highway.

Harsh flying conditions threaten the search for a historic missing plane.

Ranking history's 10 most dramatic global disasters.

Ten of history's worst maritime disasters at sea.

Explore the 10 most dramatic structural collapses in history, from bridges to buildings.

When a dam fails, catastrophe follows; history's 10 worst dam failures.

Exploring various catastrophes that have happened in mankind's quest to conquer space, from the Apollo 1 tragedy to the Challenger and the Columbia disasters.

Witness the 10 worst sports crashes from the high-risk world of sport racing.

Trains, planes, and ships collide; exploring ten global collisions.

Earhart, Everest and the Lost City of Z; uncovering the causes behind the top 10 tragic expeditions in history.

Every day our planet faces deadly threats; from earthquakes, viruses, tsunami's and extreme weather phenomenon, to threats from outer space in the form of radiation, asteroids and other space debris.

A new 3D survey of the Thai cave in Tham Luang reveals how 12 boys were rescued after being trapped.

Kathleen Martinez's 20-year hunt for Cleopatra's tomb leads her and a team offshore to explore a mysterious sunken site.

Phil reveals the survival adaptations of the elusive tree kangaroo, the colorful cassowary and the lethal scrub python in the rainforest.

A new 3D survey of the Thai cave in Tham Luang reveals how 12 boys were rescued after being trapped.

Kathleen Martinez's 20-year hunt for Cleopatra's tomb leads her and a team offshore to explore a mysterious sunken site.