Encounters with an elusive, hairy giant have been the stuff of legend for more than a century. There have been thousands of reported sightings of North America's most famous beast. Is it mythology, or some undiscovered creature of biology? Bigfoot, alson known as Sasquatch, is a large, hairy, bipedal creature with footprints that measure up to 24" in length. Is he an ancient link between man and ape? Is he an undiscovered primate? Or is he a supernatural being with a message for man?