What was the Cretaceous–Tertiary Extinction Event?
The Cretaceous–Tertiary extinction event was a mass extinction which occurred an estimated 65.5 million years ago, wiping out a substantial number of the species on Earth. Estimates of the severity of the Cretaceous–Tertiary extinction event vary, with some biologists suggesting that as many as 85% of plant and animal species might have been lost during this period in Earth’s history. Other estimates are more conservative, but still quite remarkable.
