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 ...

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 ...

After you roll your clocks back by an hour this Sunday, you may feel a bit bleary, maybe even disoriented. That’s because your body has its own network of tiny, coordinated biological clocks. These ...