Predators

In the Umm Jirsan lava tube, the longest such structure in Saudi Arabia, scientists discovered piles bones belonging to animals that hyenas devoured there for thousands of years.

The eel probably thought "not today" as it burrowed out of the heron's stomach.

For the first time, scientists have observed snakes disemboweling toads to dine on their organs.

Harley Quinn has a hyena friend in the movie "Birds of Prey," but even without supervillain sidekicks, hyenas are super-awesome.

Paleontologists in Poland unearthed the jaws and teeth of a pliosaur, an ancient marine reptile with a bite more powerful than that of T. rex.

An elephant's seemingly final act after it was attacked by a crocodile was to collapse on top of the reptile, crushing the would-be predator.

This is the first evidence of sharks eating terrestrial birds.

Fearsome yet tiny creatures have one of the fastest strikes in the animal kingdom.

In the Amazon lowlands, spiders as big as dinner plates dine on opossums.

There is no animal across the Americas that has been given more names than the hemisphere's dominant hunting cat often known as the mountain lion. Here's a look at the evasive predator.

Which unfortunate animal will wander too close to this ugly burrow fish's horrible mouth first?

Everybody has a plan until they get head-butted by an alligator.

A female jumping spider went to great lengths in a leaping experiment.

Llanocetus denticrenatus lived about 34 million years ago. It was big. It was an early ancestor of modern humpbacks and blue whales. And it had teeth.

Extinction is not a good thing. Why are people still arguing about this?

A colorful sea slug feasts on microscopic marine creatures called zooplankton, but it captures more of them in a gulp by using a middleman.

With a skull-piercing bite, a jaguar makes a caiman into a meal.

A jaguar ambushes a giant jacare caiman high up on the Three Brothers River in the Pantanal in Mato Grosso, Brazil, on Sept. 26, 2017.

One unique arachnid found not only in the Sonoran Desert but also in the Mojave and Chihuahuan deserts is the desert tarantula. Check out these amazing photos of desert tarantulas.