Bull sharks (Carcharhinus Leucas) are one of the ocean’s most fearsome creatures. Although some animals may prey on bull sharks, such as crocodiles, killer whales, and the occasional great white shark ...

Great white sharks have a reputation for being some of the most ferocious animals in the ocean, owing in part to their mouth full of sharp, serrated teeth. Most people believe that they are born as ...

Scientists studied how the sea creatures, also known as chimaeras or ghost sharks, ended up with one of evolution’s most bizarre appendages. By Jack Tamisiea Life in the ocean’s dark depths can be ...

Add Yahoo as a preferred source to see more of our stories on Google. A paleontologist holds a megalodon fossil tooth. Kristen Grace/FLMNH, CC BY-SA The ratios of strontium isotopes in fossil shark ...

Even sharks’ famous tooth-regrowing ability may not save them from ocean acidification. Researchers found that future acidic waters cause shark teeth to corrode, crack, and weaken, threatening their ...

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A rendering of Clavusodens mcginnisi, or “McGinnis’ nail tooth,” an ancient shark that stalked the ocean floor 340 million years ago. Rendering courtesy of the National Park Service A shark no larger ...

Shark teeth are often considered the most common vertebrate fossils in the world, and for good reason. Each individual shark has rows upon rows of chompers that fall out and get replaced in conveyor ...

Growing up, I never loved jewelry. But I’ve been wearing the same necklace for the past year: a wrapped lemon shark tooth ...

Great white sharks have a reputation for being some of the most ferocious animals in the ocean, owing in part to their mouth full of sharp, serrated teeth. Most people believe that they are born as ...