Sharks

Feared by most, loved my 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 of the Shark family are predatory, though some are more ferocious than others. Ironically, the largest of the shark species, the whale shark and basking shark, are virtually harmless plankton eaters. Sharks have an extraordinary sense of smell when it comes to hunting prey, and have been known to be able to sense visually undetectable amounts of animal blood dispersed into the water from considerable distances.
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There's Science Behind that 'Jaws' Sighting (Op-Ed)
A great white shark.
January 28th, 2016
It was, by any measure, a giant and should be cause for celebration.
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Photos: Baby Sand Tiger Sharks
A place to grow, sharks, sand tiger sharks
January 6th, 2016
Scientists have discovered a shark nursery off New York where baby sand tiger sharks migrate in order to eat and grow. See photos of the little sharks, ranging in age from several months to 5 years.
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Everything's Bigger in Texas: Ancient Supersize Shark Fossils Unearthed
An ancient shark found in New Mexico
October 16th, 2015
A mega shark that lived 300 million years ago would have made today's great whites look like shrimps, according to fossils of the beast unearthed in Jacksboro, Texas.
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'Kidnapped' Sharks Use Their Noses to Navigate Back to Shore
Wet research, leopard shark navigation
January 6th, 2016
Sharks may use their keen sense of smell to navigate the vast ocean, a new study finds.
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Forget the Flashlight: New Ninja Shark Species Lights up the Sea
lanternshark teeth
December 29th, 2015
The ocean can be a deep and dark place, but the so-called "ninja" shark can light up its surroundings with a dimly glowing head, a new report says.
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8-Foot-Long Bull Shark Pulled from Potomac River
A bull shark.
September 4th, 2015
Think sharks only live in the ocean? Think again.
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Why Beached Great White Shark Was Such a Rare Sight
rescued great white shark
July 15th, 2015
A young, great white shark had a near-death experience when the retreating tide left it stranded on a beach in Cape Cod on Monday afternoon (July 13). Beachgoers spotted the giant fish writhing on the sand, and threw water on its gills to help it breathe.
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Photos: Sharks with Nose Plugs Have Trouble Getting Home
Underwater view, leopard shark navigation
January 6th, 2016
Leopard sharks may use smell to help them navigate the ocean, a new study finds.
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Clever Cuttlefish 'Freeze' Bioelectric Fields to Avoid Predators
A cuttlefish freezes on the bottom of its tank in response to a video of a looming shark coming its way. This freezing behavior tamps down the natural electrical field emitted by all living things.
December 2nd, 2015
Color-changing cuttlefish have figured out how to turn down their emanating electric fields to hide from sharks and rays. They freeze in place and hold their breath, researchers have found.
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Mako Shark Phones Home, Revealing Epic Journey
A longfin mako shark that was tagged by U.S.-Cuban scientists in February 2015.
August 31st, 2015
One of the toothy stars of "Shark Week" has just phoned home after five months at sea, revealing that this longfin mako shark was a prolific and deep-diving swimmer.
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