Various types of clocks appeared in the images: some with Roman numerals ... "Most people can tell the time and use calendars from an early age," said study lead Rohit Saxena, from Edinburgh ...

The Colgate clock, with a 40-foot diameter, has been telling time since 1924. High atop a former soap factory in Clarksville, Indiana, is one of the world's largest clocks, a landmark that has ...