In a grandfather clock, a pendulum swings back and forth and this periodic motion is maintained using the energy stored in ...

Imagine a train parked at the station. Passengers climb aboard and find their seats. Conductors move up and down the aisles, ...

A newly discovered genetic clock acts as the master timekeeper for development, orchestrating crucial bursts of gene activity ...

Molecular clocks in our cells synchronize our bodies with the cycle of night and day, cue us for sleep and waking, and drive daily cycles in virtually every aspect of our physiology. Scientists ...

In April of this year, Spanish athlete Beatriz Flamini emerged into the light after a 500-day stay in a cave. Her descent underground is probably the longest undertaken by a long stretch. Flamini says ...