Trivia.com
Clocks were, before 1687, made with only an hour hand.
Trivia.com
One second is technically the duration of 9,192,631,770 oscillations of a Caesium 133 atom's outermost electron.
Trivia.com
A second is called a second because it's the result of the second division of an hour by 60.
Trivia.com
A second is quick, but a nanosecond is one billionth of a second
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