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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 greatest success stories. These animals are uniquely adapted to their ocean environment with...
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Long before great white sharks appeared, much larger ancestors roamed the ocean...
In this episode of the Podcast of Life , students from Martha's Vineyard...
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Lying in water only a foot deep, I watched the shark meander lazily through the...

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A male great hammerhead shark swims in the Bahamas at sunset. Scientists debate the purpose behind these sharks' hammer-shaped heads. A commonly accepted theory is that the shape allows the shark to scan a wider area of the ocean...
What would happen if we let our fear of sharks lead people to kill them all...
I want snack, so give me cookie! The cookie cutter shark ( Isistius...

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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...
Sharks have six highly refined senses: smell, hearing, touch, taste, sight, and electromagnetism. These finely honed senses, along with a sleek, torpedo-shaped body, make most sharks highly skilled...
Imagine that you're a shark swimming beneath the surface, minding your own business, when—smack!—you swim right into a net. Entangled, you are unable to keep swimming forward to draw water over your...
Lying in water only a foot deep, I watched the shark meander lazily through the mangrove, already exuding the confidence inherent of the supreme creature within its domain. It was hot here in Bimini...
Scientists in the Division of Fishes at the Smithsonian's National Museum of Natural History use X-ray imaging to study the complex bone structure and diversity of fish. This image gallery showcases...
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...
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...
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...
From a distance, Henry the Fish looks like a typical quirky and colorful sculpture you'd find in a small beach town. But when you look up close, Henry begins to change. His bright yellow and red...
A life-sized model suspended over visitors at the San Diego Natural History Museum shows what an ancient shark, the Giant Megatooth ( Carcharodon megalodon ), might have looked like. More about the...
Dr. Mahmood Shivji of the Guy Harvey Research Institute and Save Our Seas Shark Center sampling a confiscated shark fin for DNA analysis. He can determine the species for hundreds of shark fins using...
"Tens of millions of sharks are killed each year, often only for their fins. I have wrestled with how to take pictures of dead sharks that resonate with readers. One morning, I jumped into the sea in...
Long before great white sharks appeared, much larger ancestors roamed the ocean. This giant ancient shark -- the Giant Megatooth ( Carcharodon megalodon ) -- was probably big enough to eat a whale.
Great white sharks are athletic hunters, leaping completely out of the water as they attack prey from below. They have six highly refined senses : smell, hearing, touch, taste, sight, and...
Imagine an adult person – now triple that size. That’s the size of the great white shark ( Carcharodon carcharias ). The biggest great white sharks can reach up to 20 feet long, but most are smaller...
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,...
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...
In this episode of the Podcast of Life , students from Martha's Vineyard Regional High School in Massachusetts and La Salle Academy in Rhode Island question shark researcher Greg Skomal about a...
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