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Despite decades of effort, a theory of quantum gravity is still out of grasp. Now a group of physicists have proposed an experimental test of whether gravity is quantum or not, to settle questions about the force’s true nature. The...

source: NewScientist

Eighty years after the discovery of dark matter, physicists remain totally stumped about the nature of this invisible stuff that, judging by its gravitational effects, pervades the cosmos in far greater abundance than all the matter we can see. From axions to WIMPs (or “weakly...

source: Quanta Magazine

If the universe were a soup, it would be more of a chunky minestrone than a silky-smooth tomato bisque. Sprinkled with matter that clumps together due to the insatiable pull of gravity, the universe is a network of dense galaxy...

source: ScienceNews

A newly fabricated material does more than just hold up under pressure. Unlike many ordinary objects that shrink when squeezed, the metamaterial — a synthetic structure designed to exhibit properties not typically found in natural materials — expands at higher...

source: ScienceNews

Physicists have demonstrated that two independently developed concepts—quantum coherence and the nonclassicality of light—have a similar origin. Physicists have long aspired to explain seemingly distinct phenomena within a...

source: PhysOrg

Spacetime ripples from black holes are becoming routine. For a fifth time, scientists have reported the detection of two colliding black holes via their gravitational waves, tiny vibrations that warp the fabric of spacetime. Unlike previous gravitational wave detections,...

source: ScienceNews


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