Pick the topics you care about. Your homepage shows them first. No account needed.
Get new stories on your phone
The mathematical model that combines three dimensions of space with one dimension of time.
In physics, space-time treats time as the fourth dimension. According to Einstein's theory of general relativity, massive objects cause space-time to curve, which is what we experience as the force of gravity.
Physicists have found that gravitational fields can break and reconnect, sharing unexpected traits with magnetic solar flares.
Researchers have demonstrated a fundamental space-time limit in quantum physics, showing that an electron's location and timing cannot both be known with absolute precision.
Physicists suggest a long-overlooked heavy particle could solve the mystery of why matter outlived antimatter in the early universe.
