This kind of clock has been around for many years and in many ancient cultures. China may have had them as early as 4,000 BC and India possibly around 2,500 BC. Egypt developed them somewhere ...

As the clocks go forward this spring, see if you can solve these puzzles based on ancient calendars. When the clocks change for Daylight Saving Time, it can often involve a bit more mental ...

Zand's 'Ingenious Clocks,' which the Houston Symphony debuts this weekend, salutes little-known 12th-century scholar ...

Ancient legends of time distortion are ... by a single absolute time that could be symbolized by an imaginary clock off somewhere in space. Einstein changed all this with his relativity theories ...

Researchers at Weill Cornell Medicine and the epigenetics startup TruDiagnostic have found DNA markers linked to retroelements—remaining pieces of ancient viral genetic material—in human genes.