Search

News & Politics
Culture
Food
Science & Health
Money
Life Stories
Video
Reviews

News & Politics
Culture
Food
Science & Health
Money
Life Stories
Video
Reviews

News & Politics
Culture
Food

Science & Health
Money
Video

Search

Topic: Extinction Cycle

New eruption of the Etna volcano in Sicily. (Marco Restivo/Barcroft Media via Getty Images)

Earth has a 27-million-year "pulse"

Fearless journalism
in your inbox every day

Sign up for our free newsletter

• • •

Home
About
Staff
Contact
Privacy
Terms of Service
Archive
Go Ad Free

Copyright © 2026 Salon.com, LLC. Reproduction of material from any Salon pages without written permission is strictly prohibited. SALON ® is registered in the U.S. Patent and Trademark Office as a trademark of Salon.com, LLC. Associated Press articles: Copyright © 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

This is an alert message.