The flow of time isn’t as consistent as we might think – gravity slows it down, so clocks on the surface of Earth tick slower than those in space. Now researchers have measured time passing at ...

They discovered that the birth time of the electron that flies away is technically unknown. It simultaneously exists in a quantum state where it departs at both an earlier and later time-on ...

A group of physicists has measured gravity using the effects of time dilation — the slowing of time imparted by increased velocity or gravitational force — on atoms.

An atomic clock measured how general relativity warps time across a millimeter The record-breaking result reveals the incredible precision achievable by atomic clocks ...

Scientists have measured the shortest unit of time ever, the time it takes for a particle of light to cross a hydrogen molecule.