Tag: Ancient Alarm

  • The First Alarm Clocks Used a Burning Rope!

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    Before your phone buzzed you awake, people used burning ropes as alarm clocks! In ancient China, around the 4th century, folks would tie knots in a rope, light one end, and let it burn slowly overnight. The knots were spaced out to mark time—when the fire reached a knot, it would burn through and drop…