Almost 13,000 years ago, wooly mammoths,giant sloths, saber-toothed cats, and many other large animals disappeared from the Earth. No one knew why until now. There has been a discovery of a very fine layer of dark dirt, called a black mat, which has bee

Scientists now believe that either a meteorite or comet either exploded over the Earth or slammed into it, or both, are the reason the wooly mammoths and other large animals became extinct 13,000 years ago right before the Big Freeze.