Koko, the gorilla who mastered sign language, dies
Koko, the 230-pound gorilla who converses in sign language, admires her new kitten in this April 2, 1985 file photo. AP (file) WOODSIDE, Calif. — Koko, the gorilla who mastered sign language, has died. The Gorilla Foundation says the 46-year-old western lowland gorilla died in its sleep at the foundation’s preserve in California’s Sana Cruz mountains on Tuesday. Koko was…