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Jan 1, 1039
Iron Fish
Chinese text shows an "iron fish" suspended in water that pointts south -
Dec 31, 1087
Chinese Writing
Chinese writing describes the process oof magnatizing a needle to pooint south -
Period: Jan 1, 1200 to
The compss
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Jan 1, 1300
The Compass was Invented
The compass was invented in Europe -
Jan 1, 1492
Christopher Columbus saw odd things happening to his compass during his voyage
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Italian Geographers
They note that the earth has two magnetic poles -
The GPS
