Researchers have discovered that chimpanzees at the Edinburgh Zoo in Scotland use various grunts to communicate with each other about the food they find in their pen. Monkeys are already known to communicate through vocalizations but this evidence is the first that demonstrates that (non-human) great apes use vocalizations to communicate as well.

Find out more: Chimp Dinner Conversation Proof of Ape Speech? (National Geographic)

Photo © William Attard McCarthy