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A breakthrough wormhole simulation could unite quantum physics and general relativity

Scientists have developed a quantum experiment that allows them to study the dynamics of wormholes, theoretical entities of space-time from Albert Einstein’s theory of gravity in 1915, or general relativity. Rather than creating an actual wormhole, a rip in time and space that is theorized to bridge one distant region of space with another, the …

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Cosmic chocolate pralines? The general structure of neutron stars revealed

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Studying the speed of sound revealed that heavy neutron stars have a hard mantle and a soft core, while light neutron stars have a soft mantle and a hard core, much like different chocolate pralines. Credit: Peter Kiefer and Luciano Rezzolla So far, little is known about the interiors of neutron stars, those extremely compact …

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Cosmic chocolate pralines? The general structure of neutron stars revealed

The cosmic test of general relativity disagrees with Einstein

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A new large-scale test of Einstein’s “general relativity theory” has raised questions about this cornerstone of modern physics. “General relativity” provides a powerful predictive framework for one of nature’s fundamental forces: gravity. The theory is remarkably successful in describing gravity when talking about stars and planets. But different physical scales present challenges for Einstein’s theory. …

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