Fossils reveal dinosaurs were flourishing in diverse ecosystems right up until the asteroid impact ended their reign.

A newly described dinosaur that appears to have persisted beyond a catastrophic die-off is forcing scientists to rethink how mass extinctions actually play out on the ground. Instead of a clean break ...

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The Triassic-Jurassic Extinction Event: How Dinosaurs Took Over Roughly 201 million years ago, the Triassic-Jurassic extinction event wiped out about 76% of all marine and land species on Earth. This ...

Silhouette of the Tyrannosaurus called Stan. This "tyrant lizard king," was excavated and prepared by the Black Hills Institute. © Louie Psihoyos/CORBIS What ...

Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed flourishing communities. Alamosaurus was one of the last dinosaurs from ...

For decades, scientists have debated what wiped out the dinosaurs 66 million years ago. The usual suspects? A massive asteroid or powerful volcanic eruptions. But now, researchers from Dartmouth ...

Among today’s birds, the species most closely resembling their dinosaur ancestors are large, flightless ground-dwellers like ostriches, emus (pictured above), cassowaries, rheas, and kiwis. Some of ...