It wasn’t so long ago that humans believed we were the only species that taught each other things that related to our own specific experiences. Not so, according to Orangutan Foundation International. In fact, orangutan populations in Borneo “use handfuls of leaves as napkins to wipe their chins while orangutans in parts of Sumatra use leaves as gloves, helping them handle spiny fruits and branches, or as seat cushions in spiny trees.”