Attorneys for the Cincinnati Zoo said Ndume, a 37-year-old silverback gorilla, has lived in isolation to his detriment since Koko's death in June.

Hundreds of students are expected to participate Today in the Minnesota Zoo's second annual American Sign Language Day.

This spring, the Oklahoma City Zoo and Botanical Garden will begin providing American Sign Language (ASL) interpreters for guests who are deaf and hard of hearing.

Zoo Atlanta is partnering with the Georgia Center of the Deaf and Hard of Hearing to host American Sign Language (ASL) Family Day.

Chantek, a 39-year-old male orangutan known around the world for his ability to use American Sign Language to communicate, has died at Zoo Atlanta.

Chantek -- one of the first orangutans in the world to learn sign language, and who used it to communicate with his zookeepers -- has died at the age of 39.

Koko was born at the San Francisco Zoo in 1971, and Dr. Francine Patterson began teaching the gorilla sign language that became part of a Stanford University project in 1974.

American Sign Language majors from St. Catherine University also will volunteer their services around the zoo. The Minnesota Zoo has had World Language Days since 1979.

The adorable moment a bilingual toddler tells a family friend all about her day at the zoo in British sign language has gone viral online. Footage shared on Facebook shows Kate Sinclair, two, from ...

Chantek, a 39-year-old male orangutan known around the world for his ability to use American Sign Language to communicate, has died at Zoo Atlanta.

ATLANTA — Chantek, a male orangutan at the Atlanta zoo who was well-known for his knowledge of sign language, has died at age 39, officials say. The orangutan's cause of death hasn't been ...