2016 is the year that just won't quit. Literally.

In the nick of time, we're getting just what we needed: more of 2016.
To keep this relentless year going, we get to enjoy an extra second, known as a leap second, on Saturday Dec. 31.
The extra time is all about syncing the earth's rotation with the world's atomic clocks. Since it doesn't take a perfect 24 hours for the planet to rotate on its axis, every few years we add a leap second. The earth's rotation is actually slowing down, even if just a bit. 
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