A new method uses helium droplets combined with ultrashort laser pulses to trigger chemical reactions in a controlled way.

Time travel has long been a staple of science fiction, captivating imaginations with the possibility of moving through time ...

A festinating new theory shifts focus from space to time, arguing the clock-ticking we take for granted is richer and weirder ...

But general relativity allows for more dramatic effects. Clocks on high-speed spacecraft or near massive objects like black ...

Time travel may be a staple of science fiction, but physics tells a more complicated story, one that’s still unfolding.

Atomic clocks in current GPS satellites will lose or gain a second on average every 3,000 years. ... The idea works according to Einstein’s theory of general relativity, ...

100 years on, ESA tests Einstein’s relativity theory with atomic clocks on ISS. Neetika Walter. Mon, April 21, 2025 at 11:48 PM UTC. 3 min read.

Sneaky clocks: Uncovering Einstein's relativity in an interacting atomic playground Date: March 5, 2025 Source: JILA Summary: Researchers have explored the interplay between gravitational effects ...

Ekkehard Peik, one of the field’s pioneers, says such a clock could be a factor of 1,000 times better than today’s standard atomic clocks.

Ekkehard Peik, one of the field’s pioneers, says such a clock could be a factor of 1,000 times better than today’s standard atomic clocks. In atomic clocks, the electrons around an atom’s ...

Picture a clock ticking so steadily that it doesn’t lose a second, even after running for 1 billion years. Scientists are now closer than ever to realizing that level of timekeeping precision ...