A young bull elephant in South Africa appears to have invented a game in which he uses his trunk to fling rocks at safari guides, forcing them to play defense. Elephant flings rock toward safari guide ...

Elephants are fascinating animals, and their trunks are even more impressive once you realize everything they can do. This long, flexible combination of nose and upper lip has over 40,000 muscles ...

Source: Martinvl, via Wikimedia Commons. Play behavior can be a delicate balance between cooperation and competition. In apes and monkeys, a relaxed “play face” signals that one’s intentions are not ...