HANOVER, NEW HAMPSHIRE—According to a Phys.org report, Weronika Tomczyk of Dartmouth College and her colleagues examined more than 300 dog bones recovered from the site of El Castillo de Huarmey in northern Peru, where a royal tomb of the Wari Empire was uncovered. “Only some remains were found in undisturbed contexts, while most came from the fill disturbed by the looters’ activity in the 1980s,” Tomczyk said. She and her colleagues focused their study on mandibles or tibias in an effort to avoid sampling the same dog more than once, resulting in a group of at least 20 individuals of various ages, from puppy to senior dogs. Most of the bones, which range in size, showed minimal butchery marks. Some of...