Uganda

A young chimpanzee makes eye contact. New research suggests that chimpanzees are capable of rational thought and changing their decisions when new evidence emerges. Illustration: depositphotos.com

Psychologists have discovered that chimpanzees are capable of rational thought, similar to humans.

A team of researchers from the University of California, Berkeley, and partner institutions studied chimpanzees in the E-Ngamba Reserve in Uganda and found that they change their choices when given stronger evidence – a finding that places rationality at the center of
The White Nile Falls in South Sudan. Photo: Dr. Assaf Rosenthal

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Mountain gorilla. From the Houston Zoo website

Gorillas sink further into the fog