Discovery of a 160-million-year-old fossil represents a new milestone in early mammal evolution

Wednesday, August 24, 2011 - 13:30 in Paleontology & Archaeology

A remarkably well-preserved fossil discovered in northeast China provides new information about the earliest ancestors of most of today's mammal species -- the placental mammals. This fossil represents a new milestone in mammal evolution that was reached 35 million years earlier than previously thought, filling an important gap in the fossil record and helping to calibrate modern, DNA-based methods of dating the evolution.

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