Koko, the gorilla who mastered sign language and showed the world what great apes can do, has died. She died Tuesday in her sleep at age 46, The Gorilla Foundation said in a statement.

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

KOKO the gorilla knew over 1,000 signs based on American Sign Language, and used them to do everything from asking for food to joking around. Her trainer and long-term companion, Penny Patterson ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...

A gorilla known for her tickle fights was euthanized due to age-related health decline, a Colorado zoo said. A western Iowland “gorilla icon” named Roxie who was known by Cheyenne Mountain Zoo ...