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The day hasn’t always been 24 hours long, and it’s getting longer

The day hasn’t always been 24 hours long, and it’s getting longer

by Colin Stuart | May 17, 2017 | Astronomy, Explainer

The day may be 24 hours long now, but that hasn’t always been the case. Nor will it be the case in the far future. The Earth’s rotation is slowing under the gravitational influence of the Moon. Billions of years ago, the day was just 18 hours long. The Moon and the...

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