Methane didn’t warm ancient Earth, new simulations suggest

Alternative explanation needed for why planet didn’t freeze despite dim sun

illustration of ancient earth

DIM SUN  Scarce oxygen and abundant sulfate prevented methane concentrations from getting high enough to explain why Earth didn’t freeze over around 1.8 billion to 800 million years ago when the sun was dimmer, researchers say.

Harvepino/iStockphoto

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Climate

From the Nature Index

Paid Content