Michael Trimble , a British professor at the Institute of Neurology in London, begins his new book with Gana the gorilla. In the summer of 2009, 11-year-old Gana gave birth to a boy at a Muenster zoo. But one day in August, the baby suddenly and mysteriously died. Gana held up her son in front of her, staring at his limp body. She held him close, stroking him. To onlookers it appeared that Gana was trying to reawaken him, and, as the hours passed, that she was mourning his passing. Some at the zoo that day cried. But Gana did not. Humans, Trimble tells us, are the only creatures who cry for emotional reasons. Why Humans Like to Cry is an exploration of why this would be so, a neuroanatomical where do tears come from. It s also a meditation on human psychology. Many distinctions have been offered between humans and the rest of the animal world, and to this list Trimble adds another: the anguished tear, the apprehension that life is tragic. Trimble answered questions from Mind Matters editor Gareth Cook .
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