In the arid hills of northwestern New Mexico, a discovery is reshaping one of the most enduring narratives in natural history: that dinosaurs were already on the brink when the asteroid arrived.

A tree species known only from fossils dating back roughly 90 million years has turned out to be very much alive. In 1994, a ...

Discoverer of more dinosaur species than any other living scientist, Xu Xing says some dinosaurs have birdlike traits, including feathers. Stefen Chow In a pine forest in rural northeastern China, a ...

A site in the San Juan Basin of northwestern New Mexico is providing a rare glimpse into the last days of the dinosaurs. Rocks and fossils at the Naashoibito Member site show an ecosystem that was ...

This is read by an automated voice. Please report any issues or inconsistencies here. Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million ...

Paleontologists have long debated if the dinosaurs suddenly went extinct when a 6.2-mile-wide (10-kilometer-wide) asteroid crashed into Mexico’s Yucatán Peninsula 66 million years ago at the end of ...