The Antikythera Mechanism is the oldest known scientific computer, built in Greece at around 100 BCE. Lost for 2000 years, it was recovered from a shipwreck in 1901, but nobody could understand its purpose until a century later: an astronomical “computer” that determines the positions of celestial bodies with extraordinary precision.
And since Legomania is a disease that affects a large number of scientists, a fully-functional replica out of Lego HAD to be built. See the replica in action; build by Apple software engineer Andrew Carol with 1,500 Lego Technic pieces:
via dvice (thank you Mania!)