Chronophage

Sounds like a monster created by a supervillain, not a clock at Cambridge introduced by Stephen Hawking. [Link]

The beast — with its long needle teeth and barbed tail — rocks back and forth, ultimately inserting its talons in notches at the top of the clock to move it forward. Halfway through the minute the grasshopper's jaws begin to open, snapping shut at 59 seconds.

"Time is gone, he's eaten it," said Taylor, who calls the oversize grasshopper "Chronophage," which translates to "time eater."

"My object was simply to turn a clock inside out so that the grasshopper became a reality," Taylor said.

At the unveiling, Hawking predicted the creature atop the clock would become "a much-loved, and possibly feared, addition to Cambridge's cityscape."