Wild Gorillas Use Tools, Photos Reveal

Researchers have observed and photographed wild gorillas using sticks and stumps to navigate a swampy forest clearing in the Republic of the Congo. The images provide the first documented use of tools among wild gorillas.

In one instance, a female gorilla named Leah tried to wade across a pool of water but found herself waist deep after just a few steps. She retreated, grabbed a branch sticking out of the water, and used it to gauge the water’s depth before wading deeper.