Footprints could push back tetrapod origins | Science News

ADVERTISEMENT

MISSION CRITICAL

Support credible science journalism.

Subscribe to Science News today.


News

Footprints could push back tetrapod origins

Newly discovered trackways much older than previous evidence for sea-to-land transition

By
2:07pm, January 6, 2010

Fossilized footprints found in an abandoned quarry in Poland hint that four-limbed creatures called tetrapods evolved much earlier and in a radically different environment than previously thought.

The footprints — many individual impressions, as well as some arranged in sets called trackways — are preserved in 395-million-year-old rocks in the Holy Cross Mountains, in the southeastern part of the country, paleontologist Per E. Ahlberg and colleagues report in the Jan. 7 Nature. That age substantially predates the time frame that paleontologists have pi

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from this issue of Science News

[title_1]
From the Nature Index Paid Content