Question

The alvarezes concluded that a meteorite was responsible for a mass extinction because

Answer 1

Explanation: The Alvarez hypothesis posits that the mass extinction of the dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth. ... They had determined that a 10–15 km (6–9 mi) space rock hurtled into earth at Chicxulub.