Sometimes mysteries DO have a natural explanation. Bears do sometimes walk upright for considerable distances, going by this example of one that has injured paws, and has learned to walk upright. He took a stroll through a New Jersey neighborhood to celebrate the 70th birthday of Smokey Bear a couple of years ago. This could account for some Bigfoot and Dogman sightings. Still, I don’t think those who make science into a god that can answer all questions can take much comfort in it.