Fierce and gigantic, if you ever see or come across an arapaima fish along the rainforest rivers of the Amazon, then you will ...

Chinchillas are native to South America, specifically in the Andes Mountains, where they live at heights of around 14,000 ...

In a river of southern Vietnam, a 3-foot-long creature with “sharp” teeth swam through the murky water — or tried to, at least. Something closed around the wrinkly animal and pulled it ...

These spotlights offer a glimpse into their world. With rows of long, razor-sharp teeth jutting out from a mouth that never closes, sand tiger sharks inspire awe at marine aquariums worldwide. Despite ...

Ripples barely move across the water as giant crocodilians glide effortlessly just beneath the surface. Like ghosts from a ...

The Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in "Jurassic Park." But new research suggests that this classic image might be wrong.

To determine whether dinosaurs like T. rex had exceptionally long teeth, Cullen, now at Auburn University; Brink; and colleagues examined the anatomy of living lizards and crocodiles, the ...