Sharks

A dead baby thresher shark that washed up on a beach in the U.K. might have been aborted by its mother. Analysis of the juvenile's remains revealed that it had not fully developed.

The predatory fish, nicknamed 'Ironbound', is on his way north to Canada.

Scientists tagged six great white sharks near Mexico's Guadalupe Island to monitor their social interactions. It turns out sharks love to hang out with their buddies.

Giant sharks have been lurking in the ocean for millions of years. Here are eight of the biggest sharks from the past and present.

Scientists identified shark DNA in pet food products, none of which listed shark meat in the ingredients.

Great white sharks can't see the difference between humans swimming, humans paddling on surfboards and seals, which may lead to mistaken identity when they are juveniles.

Ask any shark biologist a question about sharks, and chances are, the answer might begin with, "We're not really sure…"

Sharks have been around for over 450 million years and have gained some pretty strange traits in that time.

A new study has provided the first evidence that sharks are capable of catching some zzz and has revealed that they can do so without closing their eyes.

Here are our favorite stories about sharks, from an ancient Greenland shark to a behemoth "queen of the ocean."