The Asteroid Evidence: How the Age of Dinosaurs Ended

Across the world, inside cliffs and road cuts, there is a thin layer of rock marking one of the largest changes in the history of life. Below it, fossils belong to a world with Tyrannosaurus, Triceratops, pterosaurs, and ammonites. Above it, those groups are gone.

Inside this episode:

- A Boundary In Time - The Iridium Clue - Shocked Minerals And Glass - Finding A Crater That Was Hidden - The First Hours

Sources include the references linked below.

Sources and further reading: - [Smithsonian National Museum of Natural History, Mass Extinction video transcript](https://naturalhistory.si.edu/sites/default/files/media/file/video-transcript-mass-extinction-solving-dinosaur-mystery2.pdf) - [Natural History Museum, What killed the dinosaurs?](https://www.nhm.ac.uk/discover/dinosaur-extinction.html)

This episode is a researched science explainer. Evidence and interpretations can change as new discoveries are made; material uncertainty is stated in context.

Follow Dinosaurs Explained for another evidence-led journey into prehistoric life.