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

Mosasaurs were enormous reptiles best known for ruling ancient oceans more than 66 million years ago, but new evidence suggests some also lived in rivers. Scientists reached this conclusion after ...

From giant stick bugs to rarely seen sea creatures, these animal videos fascinated us—and led to new scientific discoveries.

One of the biggest quests in biology is understanding how every cell in an animal's body carries an identical genome yet ...

The worm is a nemertean, a group of soft-bodied marine predators found from tide pools to the deep sea. Its species is ...

At the bottom of the world’s trenches, there’s a fish that shouldn’t exist. Here’s how it earned the title of the ...

The great white shark’s fearsome reputation has been shaped in part by films like Jaws and Deep Blue Sea, which portray it as ...

Every animal with a brain needs sleep—and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and ...

Young seabirds create a seasonal food source that draws tiger sharks and pushes other sharks to change where and when they ...

Long before whales and sharks, enormous marine reptiles dominated the oceans with unmatched power. Scientists have ...

Learn about the deep sea squid that was found buried in mud, sticking its tentacles out to blend in with the environment.

Giant mosasaurs, once thought to be strictly ocean-dwelling predators, may have spent their final chapter prowling freshwater ...