Photo: Ancient Mammal Relative Dug Burrows in Antarctica?



Christian Sidor of the University of Washington digs for fossils in the Allan Hills region of Antarctica during fieldwork in January 2006.

In June 2008 Sidor and colleagues reported that fossil burrows found during their digs might have been made by cat-size mammal relatives that lived about 245 million years ago.

Photograph by Cara Fritz/Oregon State University


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