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September 2009

Those ancient inventors were pretty clever! In this month's Ask, uncover the secrets of a computer built by ancient Greeks, learn to keep time in old and new ways, and puzzle over the enduring riddle of Stonehenge. Plus, enjoy the ingenuity of medieval siege machines, and find out at last what made Archimedes shout Eureka in the bath!

Invention Studio

The Clubhouse

Book Recommendations