National Geographic Wild HD

For years sharks have been viewed as solitary predators, but scientists have recently discovered a surprising new behavior -- that this apex predator likes to hang out in gangs.

Professional shark diver Eli Martinez and scientist Matthew Smukall plunge into the nighttime world of Tiger Beach to investigate whether shark behavior changes once the sun goes down.

Marine biologist Dr. Ryan Daly and a team of scientists utilize cutting-edge technology to reveal the movements and behavior of bull sharks.

Audien Hearing is a leader in over-the-counter hearing aids, committed to making high-quality hearing accessible to all. Discover how advanced, affordable solutions are helping more people experience better hearing every day.

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

Join CSN Mint for two patriotic 1776-2026 Silver Eagle overstrikes featuring the American Flag Privy and Constitution Privy. Designed by Daniel Carr, struck using a retired Denver Mint press, and certified perfect MS70.

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Trusted brand Jacuzzi Bath Remodel and interior designer Christina Hall share their secrets on how you can easily and affordably transform your bathroom into a gorgeous custom, safe, stylish space in 1 day! Call for a FREE quote & installation.

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Trusted brand Jacuzzi Bath Remodel and interior designer Christina Hall share their secrets on how you can easily and affordably transform your bathroom into a gorgeous custom, safe, stylish space in 1 day! Call for a FREE quote & installation.

A drone films a humpback whale being strategically drowned by a great white shark; marine biologist Ryan Johnson explores how and why great white sharks become whale killers.

Oceanic titans clash in the remote crystal-blue battlefields of Ascension Island, where the yellowfin tuna are often faster, fitter and bigger than the sharks, reaching well over 250 pounds.

A team of experts travels to Shark Bay, Australia, to unlock the secrets of shark and dolphin combat; cutting-edge technology provides a window into this seldom-seen conflict.

In the Bahamas, over 30% of dolphins have shark bite scars; using a non-toxic gel bite pad and a life-sized dolphin lure, a look at bite impressions of three species that could be predators.

Sharks go head-to-head with surfers, scientists, sea lions and even whales.

Rare instances of predation on sharks by seals, crocodiles, octopi, bobcats and birds.

After inventing armored suits for divers 40 years ago, Jeremiah Sullivan jumps back in the water to test out just how foolproof his latest creation really is against hungry hammerheads and deadly tiger sharks.

Up close with some of the largest great white and tiger sharks ever filmed.

A rare event between top ocean predators was captured on video in Florida, bull sharks attacking a great hammerhead; Dr. Heithaus and a team of shark experts launch an investigation pitting one against the other.

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

Researchers investigate if orcas are hunting great whites in New Zealand.

Shark experts Nico Lubitz and Adam Barnett head into the wilds of northeastern Australia to investigate reports of bull sharks and saltwater crocodiles clashing along the Daintree River.

At remote Norfolk Island in the South Pacific, shark experts Lauren Meyer, Adam Barnett and Charlie Huveneers investigate why tiger, dusky and Galápagos sharks gather here in such high numbers.

Shark experts investigate unusually high great white activity around a seal and sea lion colony off Australia's Greenly Island.

Scientists investigate why huge numbers of sharks gather in a dangerous lagoon on Australia's Great Barrier Reef, revealing a complex battleground.

Brown bears combine strength, agility and keen senses to succeed as omnivores.

Shark experts discover what's behind the surge in massive sharks.

Investigators explore why sharks are attacking people in cities.