Dinosaurs Dominated North America Before Asteroid Extinction
New Research Challenges Ideas of Dinosaur Decline Before Asteroid Impact For decades, scientists have debated whether dinosaurs were in decline before the catastrophic asteroid impact that ended their reign 66 million years ago. A new study offers fresh insights into this question, suggesting that dinosaur populations in North America were still thriving just before the mass extinction event. The research, published in the journal Science , focuses on a section of the Kirtland Formation in northern New Mexico, an area known for its rich deposits of dinosaur fossils. Scientists have studied this region for nearly a century, but recent findings indicate that these fossils and the surrounding rocks date back to about 400,000 years before the asteroid strike. This time frame is considered very short in geological terms. Daniel Peppe, a paleontologist at Baylor University and co-author of the study, explained that the age of the site was determined by analyzing volcanic glass particles w...