A 2,000-year-old toy chariot has allowed researchers to discover what kept ancient Roman chariots from crashing. Bronze model of a biga, ca. 1st-2nd cent. AD [Credit: © Trustees of the British Museum]The two-wheeled toy-chariot model was found in the Tiber river in the early 1890′s and is now on display at the British Museum. Studying the toy has informed scientists on a trick used in the construction of Roman chariots, preventing...

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