Leptarctus Reconstruction 1 (IMAGE) American Museum of Natural History Caption A reconstruction of the skull (upper) and head (lower) of Leptarctus primus, an extinct weasel relative that lived in North America and Asia about 20 million years ago. Credit © AMNH/N. Wong Usage Restrictions Can be used with appropriate credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.