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![Man holds flat rock encasing part of a fossilized skeleton](https://uw-s3-cdn.s3.us-west-2.amazonaws.com/wp-content/uploads/sites/6/2013/04/04195613/Roger-Smith-with-fossil-Prolacerta.jpg)
Mass extinction findings: Roger Smith with fossil Prolacerta
Mass extinction findings: Roger Smith with fossil Prolacerta Roger Smith of the Iziko South African Museum holds a fossil skeleton of Prolacerta collected during an expedition to Antarctica.Photo Credit: Christian Sidor/U of Washington