Tonight's leap second explained in precisely one second

At 11:59pm tonight an extra second will be added to the passage of time.

Why? Who better to give you a TL;DR explanation than Sean Shannon, the Guinness World Record holder for fast talking with a rate of 655 words per minute (about 10 or 11 words a second), who we asked to sum it up in under one second.

That's right: "Earth's weird spin adds extra second."

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