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A Brief History of Timekeeping: The Science of Marking Time, from Stonehenge to Atomic Clocks Suclass Code_ID13 Do you yearn to makeEntertaining and engrossing Sean Carroll Press the snooze button on your alarm once too often and you soon remember the importance of good timekeeping. That need to tell the time connects you to over five thousand years of human history, from the first solstice markers at Newgrange to quartz crystal oscillating in your watch today. Science underpins time: measuring the movement of Sun, Earth and Moon, and unlocking the mysteries of quantum mechanics