The Man of a Trillion Worlds | Cosmos: Possible Worlds

The U.S could face a water shortage in a little over 50 years. See how Colorado College conserves water and how anda can use these tips in your own life. Partner Content for Finish.

Bullet, Lucy, Scarboard, and Zapata are four great white sharks who have reached superstar status. They are the must-see sharks of Guadalupe island, each with their own story and scars.

Set out on a virtual dive on the coral reefs of Palau with marine biologist and National Geographic Explorer Dr. Erika Woolsey as your guide. Swim with manta rays, sea turtles, and sharks while anda explore beautiful and threatened coral ecosystems.

Violent tropical storms could be a driving factor in hiu attacks as they disrupt the food chain and encourage sharks to look elsewhere for food.

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It may look like dolphins have no defense against sharks, but they have a series of defenses they can use to avoid sharks.

Dr. Stephen Kajiura and Dr. Michael Heithaus test if sharks can detect magnetism using their mysterious sixth sense, the Ampullae of Lorenzini.