
Satellites Keep the World’s Clocks on Time. What if They Fail?
Standardized time is broadcast by satellite networks around the world, but their signals are vulnerable to interference—so the UK is building a more ..
Standardized time is broadcast by satellite networks around the world, but their signals are vulnerable to interference—so the UK is building a more ..
Physicists are devising clever ways to exploit the extreme sensitivity of gravitational wave detectors like LIGO. But they’ve seen no signs of exotica ..
How might our universe emerge like a hologram out of a two-dimensional sheet? An infinitely distant “celestial sphere” could hold answers. ..
Manipulating the master clock could help astronauts, pilots, shift workers, and even holiday travelers. The solution is simpler than you think. ..
Physicists have linked the “gravitational memory effect” to fundamental cosmic symmetries and a potential solution to the black hole information paradox. ..
The concept of a dimension seems simple enough, but mathematicians struggled for centuries to precisely define and understand it. ..
Spurred on by experiments that scramble the ordering of causes and their effects, some physicists are figuring out how to abandon causality altogether. ..