Walrus Upper Jaw Bone, Dated 1200-1400 CE (IMAGE) University of Cambridge Caption A walrus rostrum (upper jaw bone) with tusks used in the study. It can be dated to c.1200-1400 CE based on the characteristics of a runic inscription in Old Norse. It is from the collections of Musée Vert, muséum d'histoire naturelle du Mans, and may once have been part of an ecclesiastical treasury in France (catalogue number MHNLM 2004.3.53). Credit Photograph courtesy of Musées du Mans. Usage Restrictions Please 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.