The Corpus Clock has neither hands nor numbers. Unveiled to the public by Stephen Hawking in 2008, the clock is now a tourist attraction outside Corpus Christi College library. A giant grasshopper, referred to as a "time eater", inches its way around the edge of the clock face. Each movement, representing a single second, sends blue lights flashing across the clock's gold-plated surface. These lights settle at the precise hour and minute only once every five minutes.