Koko, the gorilla who learned sign language and became a pop-culture phenomenon, will be laid to rest at the animal sanctuary in Northern California where she lived.

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, ...