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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 ( Carcharocles megalodon...
The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller than...
What is scarier: sharks or extinction? This video from Save Our Seas puts...
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Sharks are much older than dinosaurs. Their ancestry dates back more than 400...

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The shortfin mako shark ( Isurus oxyrinchus) is found offshore in tropical and warm temperate waters of all oceans, but has been known to travel to cooler waters at times. It is very strong and the fastest known species of shark...
This photo of a freshly cut dorsal fin from a scalloped hammerhead shark (...
The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller...

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There are more than 500 species of sharks swimming in the world’s ocean. Yet when most people think of these cartilaginous...
The scalloped hammerhead shark is one of the five species CITES has protected.
The foot-long extinct shark Falcatus falcatus lived during the early Carboniferous period around 325 million years ago. The species, known from fossils in the Bear Gulch formation of Montana , was...
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 ,...
A great white shark ( Carcharodon carcharias ) emerges from the water's surface, gaping at the photographer. Gaping is a way sharks communicate with each other, and maybe even try and communicate...
What is scarier: sharks or extinction? This video from Save Our Seas puts whether we should fear sharks or they should fear us into perspective . Humans have killed killed off 95% of some shark...
Perhaps the most distinctive marine animal of all—the Great Hammerhead has a unique hammer-shaped head that gives it large visual range. Like other sharks, the hammerhead has many teeth. More so than...
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 . Learn more about the great white...
By-catch, illegal fishing, sport fishing, loss of prey and habitat and shark nets are threatening Great White Shark ( Carcharodon carcharias ) populations globally. More about the great white shark...
In California, the Gulf of Farallones National Marine Sanctuary provides protection to Great White Sharks and other species. More about the great white shark can be found in our Great White Shark...
Enric Sala has spent much of his career looking for the ocean's "time machines" -- areas rich in biodiversity and largely unaffected by humans. In this recorded webcast , Sala, a National Geographic...
The sea's largest fish has been a mystery until recent decades. Thanks to electronic tags, researchers are uncovering some of the secrets of the whale shark ( Rhincodon typus Smith, 1828 ). One...
I want snack, so give me cookie! The cookie cutter shark ( Isistius brasiliensis ) is as fearless as they come! This small, 20-inch shark can take on giants like whales and larger sharks, and have...
Save Our Seas scientist Alison Kock tags a Great White Shark ( Carcharodon carcharias ) to gather data about their movements off the coast of South Africa. More about the great white shark can be...
Great White Sharks are stealthy hunters and the secret is in their skin. Shark skin is covered by tiny flat V-shaped scales, called dermal denticles, that are more like teeth than fish scales. These...
How do we know where ocean animals swim day and night? Scientists are getting snapshots into the daily lives of whales , sharks , and even fish by tagging the animals to track their movements. You’ve...
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 (...
When we think "Africa," we think of the "Big Five"—lions, elephants, leopards, buffalo and rhinos—that crisscross the African Savannah. Few would imagine that there could be more natural beauty on...
Three bar jacks and a female tiger shark, nearly 4-meters long, swim off the coast of the Bahamas in this image captured by National Geographic photojournalist Brian Skerry. For nearly 30 years,...
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