Beginning in the 1970s, Koko the gorilla was also trained to communicate using sign language. Her sign vocabulary ranged from basics, like food and drink, to emotional signs, like sad, love, and ...

Koko, the western lowland gorilla who learned sign language and became a pop-culture phenomenon human celebrities clamored to rub shoulders with, has died.

Monkeys and apes, though both primates, exhibit distinct differences in anatomy, habitat, and evolutionary traits. Monkeys, ...

The monkeys use specific calls, known as “phee-calls,” to call each other, which scientists say is a “high cognitive” behavior pattern only previously observed in humans, dolphins and ...