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Latest Mosasaur Stories

Controversial Finding Changes Previous Belief That Ancestor Of Snakes And Lizards Laid Eggs
2013-12-17 13:54:14

George Washington University The ancestor of snakes and lizards likely gave birth to live young, rather than laid eggs, and over time species have switched back and forth in their preferred reproductive mode, according to research published in print in Ecology Letters Dec. 17. "This is a very unusual and controversial finding, and a major overturn of an accepted school of thought," said Alex Pyron, Robert F. Griggs Assistant Professor of Biology in the Columbian College of Arts and...

2009-09-16 14:04:24

Live birth -- key to much marine life -- depends upon evolution of chromosomal sex determination A new analysis of extinct sea creatures suggests that the transition from egg-laying to live-born young opened up evolutionary pathways that allowed these ancient species to adapt to and thrive in open oceans. The evolutionary sleuthing is described this week in the journal Nature by scientists at Harvard University and the University of Reading who also report that the evolution of live-born...