http://www.washingtonpost.com/wp-dyn/content/article/2005/09/29/AR2005092901934.html "The first instance was observed last October when a female gorilla (nicknamed Leah by scientists) attempted to wade through a pool of water created by elephants, but found herself waist deep after only a few steps. Climbing out of the pool, she retrieved a branch from a dead tree and used the stick to test the depth of the water." This is quite an amazing discovery. Who would have thought Gorillas were capable of using tools. Give them another million years and they could be building fire.