Animals with the most teeth: Sharks are probably the first animal that comes to mind when you think of one with a lot of teeth, but some of the world's toothiest animals aren't even predators. Nature ...

Scientists found an “armored” creature with “copper colored” teeth in rivers of Brazil and discovered a new species, a study said. Photo from Uzeda, Paiola, Cesar, Okubo, Marques-Frisoni, Andrade and ...

In a dry riverbed in Brazil, in a dense forest near the Amazon, a team of paleontologists found a fossilized jawbone from an ancient animal. Over the course of their fieldwork, they found eight ...

A Tasmanian devil expert has uncovered an evolutionary quirk that sets carnivorous marsupials apart from the crowd—and the secret lies behind their smiles. Professor Menna Jones from the University of ...

Animal teeth serve purposes beyond eating. Sperm whales use teeth to grip prey. Narwhals possess a unique tusk for competition. African elephants employ tusks for various tasks. Walruses rely on tusks ...

Understanding the diets of animals that lived long ago can tell researchers about the environments they lived in and help them piece together a picture of how the planet has changed over deep time.