We live on a spinning planet. Depending on latitude your individual speed varies from 0 mph at the poles to 1,040 mph (1,674 kph) at the equator. Here at 47 degrees north I'm madly spinning eastward ...

The Earth spins on its axis once every 24 hours, right? Actually, no. The length of each day varies widely by a few milliseconds. According to the International Earth Rotation and Reference Systems ...