Jan van Hooff
Jan van Hooff is a Dutch biologist who is best known for his research involving primates. His grandfather was the founder of the zoo in Arnhem, so he spent a lot of time there. This is where he met Mama the chimpanzee. He first met her in 1972, a year after she had moved to the zoo. They would remain good friends until her death in 2016. Before she died, van Hooff visited Mama one more time. This was captured on video and is extremely heartwarming.
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