A tumor found in a great white shark is the first ever documented in this species.
For killer whales, silence is golden as they hunt in complete darkness.
Stillborn creature is one of only a few examples worldwide of this rare birth defect found in sharks and rays.
More than 70 million years ago, a baby shark may have bitten off more than it could digest.
The species actually survived the mass extinction event of 250 million years ago and lived another 120 million years.
Sharks and dinos both thrived in the same periods. Did they ever square off against each other? Recent evidence suggests the answer is 'Yes.'
Eighteen new prehistoric sharks have been identified -- but some 60 to 90 percent of all ancient sharks have yet to be identified.
Megalodon, the world’s largest known shark at 60 feet long, died out 1.5 million years ago ... or did it?
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