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Jan 8, 2021, 1:01 pm193 ptsEcoWatch
It's a common truism that there are only 24 hours in a day, but, according to precise measurements, that isn't exactly true. The Earth typically takes 86,400 seconds, or 24 hours, to spin on its axis, TimeandDate.com explained. But the invention of precise atomic clocks in the 1960s showed that the length of…
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