National Geographic Sharks

See the world's first MRI scan of a great white shark as Ultimate Shark reveals the extreme engineering and predatory abilities of one of nature's most near perfect predators. Hear firsthand accounts of people who survived harrowing encounters, including a surfer who was bitten on the arm and leg, towed by the surfboard ankle strap and miraculously escaped only with minor injuries. National Geographic demystifies the true motives and power behind their behavior.

Hidden beneath the surface of the sea is a phenomenon we know almost nothing about. On land, scientists have long studied the great animal migrations, but in the ocean some of the most spectacular events go almost unnoticed. Now, with an international team of scientists, National Geographic examines the movements of hammerhead sharks. How do they navigate? Do they possess an internal compass? What prompts them to seek out distant destinations? In a world threatened by overfishing and declining marine populations, understanding their behavior may be the key to ensuring hammerhead survival.

While on a study in Sharkville, a shark-infested area off Africa's coast, shark expert Ryan Johnson made the discovery of a lifetime, great whites hunting at night. For the first time on film, witness this remarkable sight.

Reptile expert Brady Barr plunges to frigid ocean depths to get close up to one of the world's most mysterious, deep-sea sharks-the giant sixgill shark. These prehistoric creatures have remained elusive despite their size, but while filming some of the largest congregations of sharks ever seen, Barr and his team make an amazing observation and capture unique shark behavior on film.

The great white shark: an animal of myths and legend. All the earth's oceans are home to these fearsome predators, yet the movements of these intriguing beasts have remained largely an enigma until now. Now, National Geographic journeys on a deep-sea expedition with world-renowned shark experts Michael Scholl and Ramon Bonfil as they tag a 12-foot great white they call Nicole-named for shark-lover and actress Nicole Kidman. Nicole is lone female who takes them on an epic journey across an ocean seething with threats to her survival. Driven by overpowering natural instincts, Nicole navigates icy cold waters, dives to unfathomable depths, battles hunger and fatigue, outsmarts some of the ocean's most lethal inhabitants and ultimately travels 6,000 nautical miles in 99 days, the fastest trans-oceanic migration recorded for any fish. Experience her world up close through her eyes and senses-a world full of wonder, mystery and danger.

Off the coast of San Francisco, an unexpected killing challenged the great white shark's supremacy as the ultimate predator when one became prey to a killer whale. Whale-watchers witnessed a stunning act of nature as a killer whale rose to the water's surface with a great white in its mouth and held it there for 15 minutes. Even more amazing, biologist Peter Pyle was nearby and able to get underwater footage of two whales feeding on the shark. They ate the liver and then departed the scene, leaving the rest to the birds. The incident raised questions, such as how did the killer whale take the huge shark without a struggle? And why did the whales only eat the shark's liver?