Chicxulub impact and the dinosaur extinction (1980-1991)
Scientists discovered a giant impact crater buried beneath Mexico's Yucatan Peninsula, dating to 66 million years ago. The discovery followed the 1980 proposal by Luis and Walter Alvarez that an asteroid impact caused the dinosaur extinction.
The Chicxulub crater became the leading explanation for the Cretaceous-Paleogene extinction, which killed about 75% of Earth's species.
Impact dating became a standard tool for testing extinction theories, showing how a single well-dated crater can transform understanding of a mass die-off.
Like Chicxulub, the Ames redating connects a specific impact to a mass extinction event, showing how precise dating can reshape extinction theories.
