Being a Science Channel junkie, I watch just about anything they put on. A few months ago I watched a special about this thing called an Antikythera Mechanism (Wikipedia). Now, I don't claim to understand all the history of it, but basically it is an ancient mechanism that was found in a ship wreck in 1901. It is thought to be built in 150–100 BCE. For decades, nobody understood what the machine did, but they marveled at its extremely precise manufacture for a device that was so ancient. All kinds of scholars have tried to unravel it's workings, and I am not sure that they have done it completely to this day.
Well anyway, someone has replicated the device in Lego, and it itself is a masterpiece. The video shows some of the history behind it.
Found on BoingBoing