Have you ever been to a zoo and thought that the animals looked sad? Or perhaps you’ve visited a wildlife park and felt that the animals were chilled and content? Humans are pretty good at judging how ...

"The history of the American science of animal emotions reveals the ability of animals to teach and scientists to learn." I recently learned about a book by Pennsylvania State University distinguished ...

For years, scientists have tried to understand how animals express emotions. Unlike humans, they cannot describe their ...