Slightly off-topic (shock!) but I have always been fascinated by the Easter Island statues. A 2010 book, The Statues That Walked, corrects some of the myths about the Easter Islanders, and presents the results of experiments aimed at determining how a primitive people got those giant monoliths (called moaì) from the volcanic quarry where they were carved, over the several miles to where they were eventually erected, looking out toward the sea. Now, the authors of that book offer a video, via Discover, of an experiment that demonstrates one possible method: http://youtu.be/yvvES47OdmY Kind of looks like someone coming from an all-you-can-eat buffet. The experiment is described in a paper in the current issue of Journal of Archaeological Science.