Crying is one of the most recognizable human emotional signals. Tears appear when people experience grief, relief, joy, or deep stress. Because this response is so familiar, observers often assume ...

A meta-analysis combined about 30 years of wildlife studies to examine how animals respond to human activity. Animals usually show stronger fear responses in areas with hunting or lethal human ...

Why is it that a squirrel may calmly take food from a picnic table while a deer runs as if its life depends on it at the snap of a twig? For years, ecologists have asked whether animals always treat ...