Scientists estimate that the Earth's rotation is slowing at the rate of 2.2 seconds every 100,000 years. The time it takes the Earth to complete one rotation increases 2.2 seconds every 100,000 years. This is a very conservative figure considering the number of adjustments our timekeepers have been forced to make in recent years. If we trace this phenomenon back in time, whatever the correct figure is, at one point in time it may have taken the Earth 12 hours to complete one rotation, (depending on its initial speed of rotation when it was created.) At that time the Earth was spinning at twice the speed it is traveling at the present time.
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