Deborah and Dr. Roger Fouts with Washoe. Washoe died on Oct. 30, 2007. The couple worked for 40 years with Washoe and documented how she communicated through American Sign Language (ACL). (Central Washington University, 1995)

Obituary for a Chimp

Deborah and Dr. Roger Fouts with Washoe. Washoe died on Oct. 30, 2007. The couple worked for 40 years with Washoe and documented how she communicated through American Sign Language (ACL).

Credit: Central Washington University, 1995