Why not ? Not to say that Earth is hollow , but BF could find some very very big caves , build some sort of civilisation , and so be quite elusive ...
Just my two Euros ...


in 1924 involved a group of miners near Mount St. Helens, Washington. The story goes that the miners spotted a Bigfoot and shot at it, apparently killing the animal. That night their cabin was surrounded by the creature's friends. They proceeded to throw stones at the building, pound on the walls and climb on the roof. The attack continued till dawn. The next day the miners packed up and abandoned the mine. The place is now called Ape Canyon (years later a miner came forward swearing he'd been the one throwing rocks at the cabin as a joke).
