Decades: 1520s BC 1510s BC 1500s BC 1490s BC 1480s BC - 1470s BC - 1460s BC 1450s BC 1440s BC 1430s BC 1420s BC
Significant People
... of a spinning gyroscope will resist a force applied to it and will start rotating perpendicular to the force applied. This is why spinning gyro tops will not simply fall ...