If you have ever sat in a quiet room with a wall clock nearby, you have probably noticed the steady tick-tock rhythm. It is such a common sound that most people barely notice it, yet the reason behind ...

YOU might think a clock with an accuracy of 1 second in 60 million years would be tough to beat. Yet atomic clocks using lattices of strontium atoms are poised to do just that, so becoming the gold ...

Sharon Ann Holgate reviews A Brief History of Timekeeping: the Science of Marking Time, from Stonehenge to Atomic Clocks by Chad Orzel Prehistoric clock At Stonehenge, the summer solstice is marked by ...