It feels so obvious that time moves forward that questioning it can seem almost pointless.

Time is not to be trusted. This should come as news to no one. Yet recent times have left people feeling betrayed that the reliable metronome laying down the beat of their lives has, in a word, gone ...

Shaped by a different biology or culture, other intelligent civilisations – if they’re out there – might understand the ...

The original version of this story appeared in Quanta Magazine. To catch a glimpse of the subatomic world’s unimaginably fleet-footed particles, you need to produce unimaginably brief flashes of light ...

“This retroactive idea. It has to be that,” says Nobel Prize-winning mathematical physicist Sir Roger Penrose, reflecting on a problem about the building blocks of reality that has dogged physics for ...

What if the flow of time isn’t as one-way as it seems? Researchers from the University of Surrey have uncovered evidence that in the strange world of quantum physics, time could theoretically run both ...

Some quantum systems may have two arrows of time, one running forwards as usual and another moving backwards. This means that, at some extremely small scales, time may have the option of moving in ...

Arts and Science researchers developed particles that use sound waves to swing in the air without external forces to determine their rate of oscillation. The discovery could further research on other ...

The chain-reaction revolution in high school physics set off by M.I.T.’s Physical Science Study Committee (TIME, July 29, 1957, et seq.) will touch 12,000 students this fall. Latest link in the ...