Solved cryptogram
Earth's day is slowly growing longer, because the tides raised by the moon act as a brake.
Astronomy Facts, sourced to NASA.
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What it means
The moon pulls the oceans into bulges, and the friction of that water dragging over the sea floor steals a little of the planet's rotational energy. The effect is tiny, on the order of a couple of milliseconds per century, but it accumulates. Fossil corals and layered sediments record daily and yearly growth bands, and they show that a day in the late Devonian ran to about twenty two hours.
The claim comes from NASA.
- SourceNASA
- CollectionAstronomy Facts
- Difficultymedium
- Length71 letters, 19 unique
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