• Tiger Subspecies

    Tiger Subspecies

    Scientists estimate only about 3,000 wild tigers are left in the entire world. Meet the subspecies and see what threats each is facing.

  • Baby Animals

    Baby Animals

    Check out some of nature's irresistibly cute baby animals.

  • Snakes


    Slither in to meet some of the largest, deadliest, and fastest snakes in the world.


Shark Features

  • Photo: Whale shark with small fish

    All About Sharks

    Sharks have prowled Earth's seas, essentially unchanged, for 400 million years. Learn more about these vital predators with facts, photos, video, and more.

  • Photo: Shark on a boat.

    "Flying" Shark Lands in Boat

    South African marine researchers lured a half-ton great white shark closer than anticipated—straight out of the water and into their vessel.

  • Photo: A nurse shark on the sea floor

    Nurse Shark

    Explore the underwater world of this bottom-dwelling shark. Learn why humans have little to fear, and much to learn, from nurse sharks.

  • Photo: Sand tiger sharks cruise the waters

    Sand Tiger Shark

    Find out why this shark is not nearly as fierce as its protruding teeth might suggest. See how surface air breathing sets them apart from their relatives.

Shark Expert