Cretaceous-Tertiary Mass Extinction
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Evolutionary biologists and geologists generally believe that a mass extinction of dinosaurs and other organisms happened 65 million years ago at the end of the Cretaceous Period. The primary cause of this extinction is generally believed to be an asteroid or comet impact, linked to the large crater found off the Yucatan Peninsula.[1]
References
- ↑ Chicxulub Impact Event: Discovering the Crater. Accessed April 24, 2007.
External links
- The K-T Event - NASA's Jet Propulsion Laboratory