Footprints could push back tetrapod origins | Science News


Help us keep you informed.

Real Science. Real News.


Footprints could push back tetrapod origins

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

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 only available to Science News subscribers. Already a subscriber? Log in now. Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content