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CREDIT: © Mary Parrish/Smithsonian Institution 1. Respect Your Elders Sharks have a long and impressive lineage. Ancient sharks were cruising the ocean 400 million years ago—long before dinosaurs roamed on land. Now-extinct ancestors of...
Sophi Bromenshenkel is an unlikely shark -lover. She's eight years old and...
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Great white sharks are athletic hunters, leaping completely out of the water as...
Reef sharks rarely get any love. These sharks, comprising several species,...

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Known to many simply as “shark girl,” Madison Stewart is an inspiring young woman with a passion to protect the creatures most people fear: sharks. S he’s been diving with sharks since the age of twelve. Here she is feeding a...
Follow a journey with satellite tags placed on bull sharks and tarpon. Both...
A great white shark ( Carcharodon carcharias ) emerges from the water's...

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Sharks are much older than dinosaurs. Their ancestry dates back more than 400 million years, and they are one of evolution’s...

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The distinctive form of a winghead shark ( Eusphyra blochii ) is revealed by an X-ray image. The Winghead Shark, one of about ten species of hammerhead sharks, has its eyes set at the tips of its...
Every summer since 1987 (that's right, shark week is 26 years old!) the Discovery Channel has been bringing the ocean to our living rooms with a week-long tribute to all things shark. Here at the...
Great White Sharks ( Carcharodon carcharias ) are powerful swimmers, capable of going 50 kph / 35 mph. They can migrate long distances, from Hawaii to California, and from South Africa to Australia...
Grey reef sharks ( Carcharhinus amblyrhynchos ) are among the most versatile and tough predators on a Pacific coral reef, but they are also among the most vulnerable species, as they are threatened...
Scientists know the Greenland shark ( Somniosus microcephalus ) moves slowly in the Arctic's cold water. They also know that parasites attack the shark's eyes. But much about this animal remains a...
The International Union for the Conservation of Nature ( IUCN ) maintains the Red List of Threatened Species , an inventory of the global conservation status of plants and animals. In a 2010 study ,...
Great White Sharks breach to hunt -- with split-second timing they grab an unsuspecting seal or sea lion in one swift snatch. Follow the action in this slideshow .
Sharks have young in three different ways. After internal fertilization, some species lay a thick egg case that encloses the shark embryo (seen in the photo here). Most species are ovoviviparous,...
For the last 150 years, paleontologists have debated the origins of the great white shark . Many believe that they descended from the 50-foot megalodon, also known as the megatooth shark (...
Named for the radiant blue color on its back and sides, the blue shark ( Prionace glauca ) traverses the world’s temperate and tropical seas. Known for traveling great distances and being a swift...
A thresher shark’s long tail fin helps not only its swimming ability, but also its ability to hunt. It can use the fin to herd and trap schooling fish by swimming in increasingly smaller circles...
This illustration shows one old idea of what the ancient shark Helicoprion might have looked like. There once was room for many ideas—some more plausible than others—because the only fossils of the...
Tom Peschak, a photojournalist with the Save Our Seas Foundation, describes the devastating effects shark nets have on ocean life along the South African coastline. The nets were installed to protect...
Great White Sharks breach to hunt -- with split-second timing they grab an unsuspecting seal or sea lion in one swift snatch. Follow the action in this slideshow .
Sharks are much older than dinosaurs. Their ancestry dates back more than 400 million years, and they are one of evolution’s greatest success stories. These animals are uniquely adapted to their...
Several Caribbean reef sharks swim over a coral reef in the Bahamas in this image captured by National Geographic photojournalist Brian Skerry. For nearly 30 years, Skerry has been swimming with and...
“Once in a while, manta rays appear in great numbers in a small bay in the Baa Atoll. The concentration of plankton must be very high in this particular bay, because up to 200 manta rays have been...
Follow a journey with satellite tags placed on bull sharks and tarpon. Both of these large predatory fish are found in coastal in-shore ecosystems and the two species have similar diets. If given the...
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