Monkeys apparently don't need a math class to get the gist of geometry. A new study in the Proceedings of the National Academy of Sciences finds that olive baboons and rhesus macaques not only ...

Researchers observed and confirmed with measurements that wild sooty mangabey monkeys in an Ivory Coast forest display foot bone flexibility that facilitates vertical climbing up skinny tree trunks to ...

Add Yahoo as a preferred source to see more of our stories on Google. (Cavan Images/Raffi Maghdessian/Getty Images) If you've ever gone hiking and reached a fork in the trail, you may be confronted ...