Via Paul McAuley
Dinosaurs diversified before spreading around the world
http://www.nature.com/news/2009/091210/full/news.2009.1137.html
Fossils found in the US state of New Mexico are providing strong evidence that dinosaurs originated in what is now South America, and had already evolved into three main groups before spreading around the world.
The implication of the find at Tawa is that Dinosaurs had already diversified into their three main groups before radiating out of South America and into the rest of the world.
Posted by Jvstin at December 12, 2009 10:46 AM