.5mm Pencil Lead Sculptures by Peter Trevelyan (These are on a page filled with "art" related to office supplies. Some of the pieces are craft, some are stunts. Some. again, those with ideas animating them, really qualify as art in my book. Check the page, then maybe comment on which are which. — ed)
The Antikythera Mechanism by Michæl Paukner -- This mechanism is an ancient mechanical calculator designed to calculate astronomical positions. It was recovered in 1900-01 from the Antikythera wreck, but its complexity and significance were not understood until decades later. It is now thought to have been built about 100-150 BC. Technological artifacts of similar complexity did not reappear until the 14th century, when mechanical astronomical clocks appeared in Europe.