Two thoughts:<p>- OK, the poop knife claim in the story sounds incredibly weird, but what about using a dog's rib cage as a sled? It would not only be too small, but there's no way it could support a grown man's weight. It amazes me that anybody could ever take this story as anything other than a troll.<p>- I'm fascinated by the fact that, in the discussion section, the authors spend paragraphs justifying this work on the basis of how it affects narratives about the ingenuity of indigenous and prehistoric peoples. Says so much about the state of science.