After the game there was a parade of Arsenal legends around Highbury and a celebration of the ground as a clock ticked down to signal the end of an era.

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"The atomic clock is actually putting out an electronic signal which is essentially analogous to the ticking of a pendulum clock... which might tick once every second or once every couple of seconds, " says Dr McCarthy.

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Inside, Williams explains, is a receiver tailored to make use of a signal from an atomic clock carried by a global positioning system satellite.

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Gene Block, a professor of psychiatry and biobehavioral sciences at University of California, Los Angeles, and colleagues found that by middle age, the signal the master body clock in the brain sends out to other internal clocks to help resynchronize the different processes gets weaker.

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Sure enough, four days in, our routine 530am radio signal snare check generated hysteria to rival any alarm clock.

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The clock face, which uses a red second hand resembling a railway signal on a monochrome background, was designed for the SBB in 1944 by engineer and designer Hans Hilfiker while the rest of Europe was focusing on other matters.

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Along the top is a sort of status bar, showing the outdoor temperature, a simple representation of the battery life for the car, the name of the currently loaded driver profile, a signal strength indicator for the integrated 3G modem and a tiny clock.

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Working around the clock for six weeks, sifting through thousands of agent reports, spy-satellite photos and signal intercepts, the task force finally pinpointed the 31-year-old Saudi-born Palestinian in a villa near Faisalabad, Pakistan.

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When a clock gene is switched on, it directs the cell to produce proteins, which eventually trigger a signal that switches the gene off.

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