Teaser: A re-examination of the fossil record has produced a new theory of the super-fish's demise.
Feared by most, loved by some and hunted by many, sharks are one of the most mysterious groups of creatures roaming the Earth today. Defined as a fish with a full cartilaginous skeleton and a sleek, streamlined body, a shark can range in size from the two foot pygmy shark, to the colossal 50-foot whale shark.There are more than 250 different species of sharks currently identified, making it one of the most diverse animal genera on the planet. Sharks are found in every major body of saltwater in the world, but are more common in warmer waters. There are a small number of shark species that do thrive in fresh water, and certain sharks have been known to venture from their saltwater homes to major freshwater lakes and rivers.Most members
The little sharks swim around inside their mom, switching between her multiple uteruses. When they get hungry they eat her unfertilized eggs.
In the new movie, one, solitary Megalodon is still lurking in the depths of the Pacific Ocean. Is that possible?
Alien, or anime character? Neither! It's Genie's dogfish — a new shark species named for the famous marine biologist, Eugenie Clark.
California's Department of Fish and Wildlife has opened up a law-enforcement investigation after this dead great white shark washed up on a Santa Cruz beach.
Scientists capture amazing underwater video of the biggest sharks, and some of the oldest, in the Arctic.
Humans and sharks are incredibly different creatures, but the two shared a common ancestor 440 million years ago, a new study finds.