On #worldchimpanzeeday, some of my favourite chimp stories. First: chimp proto-religion! newscientist.com/article/207963…
Second: chimps hunting with spears! newscientist.com/article/dn1123…
Third: chimp tribes waging war! newscientist.com/article/mg2222…
Four: wild chimp children playing with sticks as dolls! newscientist.com/article/dn1989…
Five: expressions of awe in the face of natural phenomena newscientist.com/article/dn1834…
Six: cultural differences in dining etiquette! newscientist.com/article/224479…
Seven: chimp murder and cannibalisation! newscientist.com/article/211967…
Eight: “Red Berry”, art created by a chimp called Washoe 
There's also an incredible story about Washoe (who learned American sign language). Her keeper, Kat, had a miscarriage, and Washoe, who had been fascinated with the bump, was annoyed that Kat had not been around...
Kat signed "my baby died" to Washoe, and Washoe understood her pain, and made the sign for "cry", drawing her finger down her cheek to trace a tear.
Washoe was captured from West Africa and was initially destined for use in the US space programme, was raised in a human home then at Oklahoma's Institute of Primate Studies
