A few years ago, the curious folks at the Radiolab show/podcast asked some kids to hold a Barbie doll, a live hamster, and a Furby robot upside down. Not surprisingly, the children were unfazed by the Barbie, holding it on its head for a long time. When it was the hamster’s turn, the kids were quick to release the squirming animal, for fear that they were hurting it (no surprise here either). The