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 ...

Paleontologists have long wrestled with how to differentiate between male and female dinosaurs based on their fossils. But new research may bring scientists closer to identifying the sex of one group ...

Sixty-six million years ago, life on Earth was paid a visit by a very unwelcome guest: the Chicxulub impactor, an asteroid that infamously wiped out all non-avian dinosaurs. The state of dinosaurs ...

Dinosaurs weren’t dying out before the asteroid hit—they were thriving in vibrant, diverse habitats across North America. Fossil evidence from New Mexico shows that distinct “bioprovinces” of ...

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 ...

In a new paper in Science, experts from the University of Chicago describe steps that took place some 66 million years ago to transform carcasses of a duck-billed dinosaur, Edmontosaurus annectens, ...

The end of the dinosaurs was clearly linked to an asteroid impact that brought the Cretaceous period to a close. But the details of their end have remained a matter of debate since the impact crater ...

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 ...

A pair of Edmontosaurus specimens found in a Wyoming dig help researchers to understand the process that led them to be mummified. By Jack Tamisiea During a 1908 dig in Wyoming, the fossil hunter ...

More than a century ago prolific fossil collector Charles Sternberg discovered the skeleton of a duck-billed Edmontosaurus dinosaur in the sandstone rocks of the Lance Formation in eastern Wyoming.

Brontotholus harmoni lived in the Late Cretaceous about 75 million years ago. A new species of dome-headed dinosaur has been discovered in fossils found in Montana, according to researchers. The ...