Time dilation means two observers may experience the same events years apart, revealing there is no universal “now.” ...

Optical lattice clocks are emerging timekeeping devices based on tens of thousands of ultracold atoms trapped in an optical ...

Heat has always been something we thought we understood. From baking bread to running engines, the idea seemed simple: heat ...

Autumn is here, and that means it's time for the clocks to fall back. Here's everything to know with daylight saving time ...

Now that fall has begun and the days continue to get shorter, those in the Northern Hemisphere creep towards the semi-annual ...

Abandoning the twice-per-year switch to and from daylight saving time could greatly reduce strokes and obesity cases, a new study finds.