Apple's software engineers has built a recreation of an Ancient Greek computer out of lego.
Andrew Carol has managed to build the Antikythera Mechanism wich is probably the oldest scientific computer known to man. Built it around 100 B.C to help map the stars it disappeared into history's cracks, until it was unearthed from a shipwreck in 1901.
Carol seems to have decided that it might be fun to use the most modern materials to re-create this fine mechanism. Carol used 1,500 Lego Technic parts and 30 days to put together the 110 gears and other pieces of the re-creation.
Carol's machine, each with four gearboxes, manage to make the same calculations as the original mechanism. Each gearbox makes one mathematical calculation.
You can see the gear in operation here