Earth's speed of rotation is slowing!
In a study conducted by the Columbia and Wisconsin Universities, it was discovered that Earth had completed its turn around its axis in 18.7 hours, 1.4 billion years ago.

A study of Earth's relation to the Moon and other planets has shown that it lasted 18.7 hours a day on Earth 1.4 billion years ago.

A survey of scientists from the Lamont-Doher...
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