Boom! Suddenly, the sky was on fire. Boiling-hot beads of glass rained down, blanketing and burning the ground. Dinosaurs fled in every direction, running for their lives. It was more than 66 million years ago, and a fiery space rock called an asteroid had just slammed into modern-day Mexico.
“Your eyeballs would have melted, your eardrums would have been destroyed,” says paleontologist David Burnham.
The asteroid set off volcanic eruptions and earthquakes all over the world. While some species survived, 75 percent died—including dinosaurs. But how did dinos in areas thousands of miles away from the asteroid strike die? Without witnesses, that has remained a mystery for millions of years. Now scientists, including Burnham, have uncovered an area in North Dakota filled with fossils. They say it provides a terrifying snapshot of the day the dinosaurs died.