Ronald Cohn
Ronald Herbert Cohn (November 11, 1943 – September 16, 2022) was an American zoologist who was a long-time research collaborator of psychologist Francine Patterson in her work in training Koko the gorilla in the use of American sign language. He documented much of Koko's life on film and on camera,<ref name=EK>{{#invoke:citation/CS1|citation |CitationClass=web }} </ref> and is credited as the illustrator for the children's books Koko's Kitten, Koko-Love!: Conversations With a Signing Gorilla, and Koko's Story. One of his photos of Koko was featured on the cover of National Geographic in 1978 and 1985.<ref name="RonCohn" /><ref>Stanford University Magazine website, Is Koko's Clock Ticking?, article byMarina Krakovsky dated summer 2011</ref>
At the University of Illinois at Urbana-Champaign, he received his bachelor's degree in 1965, his master's degree in zoology in 1967, and his Ph.D. in biology in 1971.<ref name="RonCohn">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
After receiving his PhD, Cohn worked as a cell biologist at the Stanford Departments of Medicine and Pediatrics.<ref name="RonCohn" /> He did research in genetic engineering and membrane structure.<ref name="RonCohn" /> He is credited with discovering that adult cells make hyaluronic acid from glucosamine, which led the way to glucosamine being used to treat arthritis.<ref name="RonCohn" />
Cohn co-founded The Gorilla Foundation with Patterson and Barbara F Hiller<ref>Newsweek website, Who was Koko? Sign-Language Gorilla Dead at 46, article by Katherine Hignett dated June 21, 2018</ref> in 1971.<ref name=EK /><ref name="RonCohn" />
Cohn died at his home in Redwood City, California, on September 16, 2022, at the age of 78.<ref name="RonCohn" />