The Antikythera Mechanism has been featured a number of times on Neatorama, including a working model created in 2008. This year a fully functional replica has been created using Lego materials. Since gears with 19, 47, 127, and 223 teeth were not publicly available, a complex differential shaft had to be fashioned.
Two Nature videos about the original Antikythera Mechanism are available at The Guardian.
Two Nature videos about the original Antikythera Mechanism are available at The Guardian.