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Approximately 500 years ago a Polish lawyer, medical doctor, and churchman got a radical idea: that the earth was not fixed solidly in the middle of all space, but was spinning at a thousand miles per hour at its equator and was speeding around the sun at a dizzying rate. Unbelievable, critics said. If that were true, at the equator people would be spun off into space. And it would be much harder to walk west than east.
The post A Copernican eye-opener appeared first on OUPblog.