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Subtle signals from black hole mergers might confirm the existence of “Hawking radiation”—and gravitational-wave detectors may have already seen them
The atom interferometry technique uses the effects of time dilation to reveal subtle changes in gravity’s strength
Runaway success and underfunding have led to growing pains for the preprint server
Two pulsars locked in close binary orbit have once again validated predictions made by Einstein's theory of general relativity.
Everything keeps getting harder and harder.