From catastrophic asteroids to terminal constipation, how did the dinosaurs get wiped out?

I’m sure you have that one friend on Facebook who bombards your feed with conspiracy theories about the moon landing, secret societies, government testing, and so on. But stop me if you’ve heard the one about dinosaurs going extinct due to terminal constipation. Yikes. That and more dinosaur extinction theory. Guest: Mike Benton, Professor of Vertebrate Paleontology, University of Bristol