Ever imagined a wild animal trying to play tag with a human with no dangerous intent? Turns out, it’s not as rare as you’d think. You’d probably think of Fido or Fluffy when you picture an animal that ...

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 ...