Quantum particles can feel the influence of gravitational fields they never touch

Scientists reveal that the Aharonov-Bohm effect also applies to gravity

image of two red spheres warping a black and white spacetime grid

According to the general theory of relativity, gravity results from massive objects warping spacetime (illustrated). A quantum effect reveals that subatomic particles can feel the influence of this warping even if they aren’t subject to gravitational forces.

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If you’re superstitious, a black cat in your path is bad luck, even if you keep your distance.