STATE COLLEGE, Pa., June 2 (UPI) -- They're man's best friend, but dogs apparently didn't get along too well with wooly mammoths. In fact, new science suggests dogs helped ancient man hunt mammoths to extinction.
For a long time, researchers have been intrigued by giant mammoth graveyards. Though humans were known to have hunted mammoths for more than a million years prior, major mammoth graveyards don't begin appearing on the geologic timeline until somewhere between 45,000 and 15,000 years ago.