Examining what killed the dinosaurs in depth
Large step-like formations of dark volcanic rock like those at Grande Ronde provide evidence of volcanic eruptions from millions of years ago. Credit: Brenhin Keller.
Determining what killed the dinosaurs 66 million years ago at the end of the Cretaceous Period has long been the topic of debate, as scientists set out to determine what caused the five mass extinction events that reshaped life on planet Earth in a geological…