Dinosaurs wiped out by asteroid, not volcanoes, researchers say

Study says surge in volcanic activity could not have caused Cretaceous/Paleogene extinction event

A 66m-year-old murder mystery has finally been solved, researchers say, revealing an enormous asteroid struck the killer blow for the dinosaurs.

The Cretaceous/Paleogene extinction event resulted in about 75% of plants and animals - including non-avian dinosaurs - being wiped out. But the driving cause of the catastrophe has been a topic of hot debate.