New research suggests that dinosaur populations were thriving in North America before the asteroid impact 66 million years ago that caused mass extinction.

Of all the mysteries surrounding dinosaurs, none has sparked more debate than how their era ended—was it a gradual decline or a sudden catastrophe? A new study led by Andrew Flynn of New Mexico State University delivers one of the clearest answers yet: dinosaurs in what is now New Mexico were thriving right up until the asteroid impact that ended their reign.

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, causing mass extinction. New research suggests dinosaur populations were still thriving in North America before the asteroid strike,

A trove of specimens from New Mexico may help settle a long-running argument about the diversity of dinosaurs before their extinction.

Paleontologists have debated the age of fossils found at the Naashoibito site in northwestern New Mexico. The new study used two dating methods to determine that the fossils date

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, causing mass extinction.

Fossil evidence from New Mexico shows dinosaurs were still strong, diverse, and thriving before their sudden extinction 66 million years ago.