Fossil Discovery Represents New Milestone in Early Mammal Evolution

Fossil Discovery Represents New Milestone in Early Mammal Evolution
Wed, 24 Aug 2011 12:52:00 -0500

A well-preserved fossil discovered in northeast China provides new information about the earliest ancestors of most of today's mammal species--the placental mammals.

According to a paper published today in the journal Nature, the fossil represents a new milestone in mammal evolution that was reached 35 million years earlier than previously thought.

It fills an important gap in the fossil record and helps to calibrate modern, DNA-based methods of dating ...

More at http://www.nsf.gov/news/news_summ.jsp?cntn_id=121422&WT.mc_id=USNSF_51&WT.mc_ev=click

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