1. Fossils reveal mammals mingled in age of dinosaurs  EurekAlert
  2. New study finds earliest evidence for mammal social behavior  Phys.org
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A cluster of ancient mammal fossils discovered in western Montana reveal that mammals were social earlier than previously believed, a new study finds.A cluster of ancient mammal fossils discovered in western Montana reveal that mammals were social earlier than previously believed, a new study finds.

Fossils reveal mammals mingled in age of dinosaurs | EurekAlert! Science News

A new study led by paleontologists at the University of Washington and its Burke Museum of Natural History & Culture indicates that the earliest evidence of mammal social behavior goes back to the Age ...

New study finds earliest evidence for mammal social behavior