Latest Issue of Science News


News

Signs of ancient sea ice

Fossils of certain marine algae suggest floating ice debuted in the Arctic at least 47.5 million years ago

Fossils of ice-dependent algae reveal that Arctic sea ice, which is today very much an endangered species, formed at least 47.5 million years ago, about 1.5 million years earlier than previously recognized.

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

X
This article is available only to subscribing members. Join SSP today or Log in.