Koko, la gorilla famosa per conoscere il linguaggio dei segni, è morta a 46 anni
Koko, the gorilla known for sign language, has passed away at the age of 46. Here she is on the cover of the 1985 National Geographic. #RIPKoko 🦍 pic.twitter.com/U95wNsGdWy — National Geographic TV (@NatGeoTV) June ...