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Where and when was the first compass invented?

April 26, 2017compass Devices invented inventions

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Where and when was the first compass invented?

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“the Olmec may have discovered and used the geomagnetic lodestone compass earlier than 1000 BC” http://en.wikipedia.org/wiki/Compass The Olmecs were Aztecs from what is now Veracruz and Tabasco on the Isthmus of Tehuantepec, south-central Mexico. “The earliest reference to a magnetic device as a direction finder is recorded in a Song Dynasty book dated to 1040-44” http://en.wikipedia.