Sharks are some of the ocean's top predators. In fact, sharks and their relatives were the first vertebrate predators on Earth. Shark fossils date back more than 400 million years -- that means sharks ...

Scientists have come one step closer to unraveling the age-defying secrets of the world's longest-living vertebrate: the Greenland shark. Understanding the biological mechanisms that facilitate this ...

Research has shown that pelagic sharks tend to have longer, narrower fins compared to their benthic relatives, which typically possess shorter, rounded fins. A key to understanding how sharks navigate ...

The goblin shark (Mitsukurina owstoni) is among the most unusual and least understood predators in the ocean. Deep-dwelling, ...

The epaulette shark’s ability to “walk” on land gives it a distinct survival advantage and traces its lineage back to the Jurassic period. When most people picture a shark, they likely imagine a sleek ...

More than 100 million years ago, scientists say, warming seas and reduced oxygen may have sent some sharks higher into the water column, where they evolved to be fierce and hungry. By Jeanne Timmons ...

A surprising expedition reveals sharks thriving in the hostile environment of Kavachi, a highly active underwater volcano.

Sharks were filmed swimming inside Kavachi, one of the world’s most violent underwater volcanoes, leaving scientists questioning how large predators survive heat, acid and eruptions in an environment ...

"Sharks are the top predators in many marine ecosystems. But tales of the killer instincts and fearsomely sharp senses of these hunters can obscure their full life histories. In fact, sharks are ...

A pod of killer whales, Orcinus orca, in the North Pacific. (U.S. National Oceanic Atmospheric Administration) (CN) — One day last summer, two observational vessels encountered a gruesome scene off ...