Asteroid Impact Created Conditions That Killed Most Dinosaurs, Not Volcanoes

Sixty-six million years ago, 75 percent of all life on Earth, including most dinosaurs, went extinct. The cause is believed to be a large asteroid that slammed into a region off the coast of modern-day Mexico. However, there has been much debate about how much of an effect intense volcanism had on life on Earth at the time. Now new research suggests the asteroid didn’t need any help from...