Dinosaurs

Known by the nickname "Mesozoic Cow," the African dinosaur Nigersaurus taqueti has also had its face compared to a vacuum cleaner.

By Mark Mancini

Fossils of just 12 individual Archaeopteryx, a winged dinosaur that live during the Jurassic, have ever been found. Aside from the rarity, what else makes this unique dinosaur so special?

By Mark Mancini

Tyrannosaurus rex, one of the fiercest meat-eaters ever, is the animal that probably springs to mind when most of us hear the word "dinosaur."

By Mark Mancini

Ankylosaurus was a dinosaur with short, squat legs that allowed it to run at about 6 miles per hour – fast, but not fast enough to outrun a large carnivorous predator like Tyrannosaurus rex.

By Patty Rasmussen

Stegosaurus, an herbivorous dinosaur from 149 million years ago, walked on four legs, had a long, beak-tipped skull, a row of spikes adorning its tail and a pea-sized brain.

By Mark Mancini

Triceratops — which literally means "three-horned face" — is one of the most spectacular and well-known of all dinosaurs. It shared the Cretaceous landscape with, and probably was preyed upon by, Tyrannosaurus rex.

By Mark Mancini

Constantly compared to the Tyrannosaurus rex, the Giganotosaurus was one of a handful of dinosaurs that rivaled, or possibly exceeded, the creature in size.

By Mark Mancini

The villainous dinosaur from 'Jurassic Park' probably never had an affinity for water.

By Mark Mancini

Someone just paid $2.36 million to take home an exquisite dinosaur skeleton. The sale has added to the growing scientific anxiety about the commodification of precious, irreplaceable fossils.

By Mark Mancini

New research suggests the asteroid impact that killed the dinosaurs probably burned Earth's forests, requiring modern birds' common ancestors to live on the ground.

By Jesslyn Shields

University of Kansas paleontologists are comparing the bones of a new T. rex to determine if they've got a juvenile Tyrannosaurus or a mature Nanotyrannus on their hands.

By Mark Mancini

Could this exciting find help bridge the gaps between Africa's late Cretaceous fossil record and that of other continents?

By Mark Mancini

The fossilized find provides us with another example of the oldest bird species we know of.

By Robert Lamb

The American Southwest was once prime tyrannosaur country, as a newfound skeleton reminds us.

By Mark Mancini

Scientists are at odds about whether Velociraptors worked together to take down their prey.

By Mark Mancini

Tyrannosaurus rex was a giant predator that roamed the earth, so why did it have such tiny arms?

By Mark Mancini

Scientists generally agree that dinosaurs sported colorful, feather-like plumage. So do moviemakers lack imagination, or do audiences?

By Chris Opfer

The colossal footprints of an herbivorous dinosaur found in western Australia might belong to the biggest dinosaur ever.

By Jesslyn Shields

Based on some baby dinosaur teeth, scientists have figured out just how long dinosaur eggs incubated. (The answer? Long. Too long.)

By Jesslyn Shields

And, to top it all off, it's got feathers on it.

By Julia Layton

Spiclypeus shipporum was a dinosaur that roamed Montana 76 million years ago, and its unique horn structures set it apart from other horned dinos.

By Christopher Hassiotis

Nature is one big interconnected system. Learn how flowers and dinosaurs helped the dung beetle appear on the planet.

By Jesslyn Shields

A new analysis of Rapetosaurus fossils can shed light on how certain dinosaurs socialized and evolved.

By Christopher Hassiotis

The new dino discovery of Timurlengia euotica in Uzbekistan shows that Tyrannosaurus rex ancestors evolved smarts before they got large and took charge.

By Jesslyn Shields

Eggs are trickier than you might think.

By Julie Douglas