The mystery behind a trove of bones from 10,000 dinosaurs

A group of paleontologists are picking through a prehistoric graveyard in a remote corner of Alberta, Canada, to solve a 72-million-year-old puzzle. They want to know why thousands of dinosaurs are buried there, under layers of dirt and dust. Host Marco Werman speaks with Emily Bamforth, a paleontologist working at the site. She's also the curator of the Philip J. Currie Dinosaur Museum.