Add Yahoo as a preferred source to see more of our stories on Google. In this animated video essay, "Sunday Morning" contributor Robert Krulwich and animator Nate Milton go inside one of Nature's ...

Elk sounds vary from grunts, screams and coos to something like an excited chimpanzee – a sound human elk callers refer to as “chuckling.” None of it sounds like something that would emanate from a 12 ...