now, I'll admit I'm no expert.... but I don't see any petroglyphs!! All I see is a stone with some scratches on it! It seems as plausible to me that a bison

now, I'll admit I'm no expert.... but I don't see any petroglyphs!! All I see is a stone with some scratches on it! It seems as plausible to me that a bison (or something else) got a rock and scratched it against another rock...