It Predicts Solar Eclipses, and Its Made of LEGO!
The video is on the Scientific American website, and I can’t embed the video here unfortunately. (Not being able to do things like embed videos is starting to bug me, so I may get my own domain soon).
[Update: The video is now on YouTube, so I can actually post it here (woohoo!), but you should still check out the Scientific American page for the article about how the video was made. Its pretty interesting]
But definetly check out the video here!
It was discovered in 1901, but its true purpose was not puzzled out until a few years ago.