Dictionary.com
definitions
  • synonyms

Alvarez hypothesis

[(al-vuh-rez)]

The theory that the mass extinction that involved the dinosaurs and many other living things was caused by the impact of a large asteroid on the Earth sixty-five million years ago.

Show More

Note

The hypothesis is named after the father-and-son team of scientists Luis and Walter Alvarez, who first suggested it.

Note

Evidence indicates that the asteroid fell in the Yucatan peninsula.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.