CLAUDIA WASCHER: It’s not only humans who feel emotions. In his 1872 book, The Expression of the Emotions in Man and Animals, Charles Darwin described a range of “innate” and “evolved” emotions in dogs, cats, chimpanzees, swans and other non-human animals. But animals can’t verbally report their emotions, and humans often misread how an animal’s … Continue reading THE HEART OF THE MATTER: Animals’ hearts reveal their hidden emotional worlds