National Geographic Wild HD

Dr. Oakley participates in a race that pits people against reindeer.

Dr. Oakley sees two stubborn muskoxen, a particularly wily coyote and a badly burned dog.

Every five seconds there's a victim of identity theft; LifeLock helps alert, restore identity, and reimburse lost funds-leading the way in protecting families every day.

Paid programming.

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

Back Pain? Hip? Sleep well thanks to this cooling topper!

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

Paid programming.

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

B. Johnson shares the Nuwave Forever Air Purifier with NeverReplace Filters; get the smart WiFi-enabled air purifier that helps achieve zero airborne pollutants without any additional replacement filters.

A team of scientists embarks on an adventurous journey with the help of the latest drone technology, and unveils the startling proximity of sharks to the shore, and reveals amazing shark action.

A fearless team dives in to solve the secret gathering of Maui sharks.

Finding out if great white sharks can change the color of their skin and camouflage themselves.

Discovering the secret life of baby great whites, right off New York City.

Even the biggest and fiercest predators start out as baby sharks.

Asking if female sharks are the ultimate rulers of the oceans.

The thaw brings new opportunities and new dangers to Alaska's residents.

Hunt or be hunted is the name of the game during summer in Alaska.

As the weather shifts, Alaskans must adapt to harvest off of the land.

Alaskans do all that it takes to prepare for the harsh, looming winter.

On land and sea, Alaskans gather valuable resources for their survival.

Winter is creeping up in the Arctic as Alaskans scramble to prepare.

Winter descends upon the young Alaskans as they prepare for the big freeze.

It's life or death as the next generation battles winter's wrath.

The next generation of Alaskans face Mother Nature's winter wrath.

Alaskans face unplanned challenges in the wild to survive and thrive.

Arctic temperatures dip below zero, complicating the lives of Alaskans.

Hawaii is shaken by three bizarre shark attacks in less than five months.