Scientists Unearth Macaque “Tools” in Thailand

OXFORD, ENGLAND—The wild macaques of coastal Thailand have been using stones as tools for generations, according to a UPI report. Scientists led by Michael Haslam of the University of Oxford observed the monkeys searching for good stones and using them to process oysters, snails, nuts, and crabs. When particular stones worked well, the monkeys placed them near the boulders where they preferred to eat. The researchers then examined the marks on the stones and excavated the area to look for similar ones. They found identical marks on stones in a layer with oyster shells that were carbon-dated to between ten and 50 years ago. “As we build up a fuller picture of their evolutionary history, we will start to identify the similarities and differences in human behavior and that of other primates,” Haslam explained.