About 66 million years ago, a seven-mile-wide asteroid slammed into our planet and began a mass extinction that wiped out all the dinosaurs except for beaked birds, not to mention about 75 percent ...

In just a few years, according to this hypothesis, these frigid and sweltering climatic extremes caused the extinction of not just the dinosaurs, but of up to 70 percent of all plants and animals ...

prior to the extinction of the dinosaurs. This instability would have made life difficult for all plants and animals and set the stage for the dinosaur extinction event. Thus, our work helps ...

A near-perfect fossilized skull discovered in Antarctica reveals the bridge between prehistoric and modern birds, a new study ...

Much of this rich life—including all dinosaurs, pterosaurs, pliosaurs, and ammonites—perished in the extinction event at the end of the period 65 million years ago. In fact, the land ...

Extinction implies that the species that perish are poorly adapted to a changing set of conditions. Faced with an evolving group of competing organisms -- the mammals -- perhaps dinosaurs were ...