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physics

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Q&A

In Search of Cracks in Albert Einstein’s Theory of Gravity

By Thomas Lewton
February 23, 2022
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Celia Escamilla-Rivera is combining large data sets with supercomputers to test general relativity against its little-known competitors.

particle physics

The Mysterious Forces Inside the Nucleus Grow a Little Less Strange

By Charlie Wood
February 14, 2022
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The strong force holds protons and neutrons together, but the theory behind it is largely inscrutable. Two new approaches show how it works.

quantum physics

Quantum Complexity Tamed by Machine Learning

By Charlie Wood
February 7, 2022
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If only scientists understood exactly how electrons act in molecules, they’d be able to predict the behavior of everything from experimental drugs to high-temperature superconductors. Following decades of physics-based insights, artificial intelligence systems are taking the next leap.

Photo of an array of metal tubes and glass pieces, with an orange laser cutting horizontally across
machine learning

Machine Learning Gets a Quantum Speedup

By Max G. Levy
February 4, 2022
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Two teams have shown how quantum approaches can solve problems faster than classical computers, bringing physics and computer science closer together.

climate science

Solving the Faint-Sun Paradox

By Jonathan O'Callaghan
January 27, 2022
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We might have a past faint sun to owe for life’s existence. This has consequences for the possibility of life outside Earth.

Illustration of a subatomic particle inside a wineglass.
explainers

How the Physics of Resonance Shapes Reality

By Ben Brubaker
January 26, 2022
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The same phenomenon by which an opera singer can shatter a wineglass also underlies the very existence of subatomic particles.

quantum gravity

In a Numerical Coincidence, Some See Evidence for String Theory

By Natalie Wolchover
January 21, 2022
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In a quest to map out a quantum theory of gravity, researchers have used logical rules to calculate how much Einstein’s theory must change. The result matches string theory perfectly.

Video that zooms out from a close-up of a few simulated galaxies to a panoramic view of many different cube-shaped universes.
astrophysics

Any Single Galaxy Reveals the Composition of an Entire Universe

By Charlie Wood
January 20, 2022
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In computer simulations of possible universes, researchers have discovered that a neural network can infer the amount of matter in a whole universe by studying just one of its galaxies.

A sphere enclosing a space with hyperbolic geometry.
quantum gravity

Symmetries Reveal Clues About the Holographic Universe

By Katie McCormick
January 12, 2022
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Physicists have been busy exploring how our universe might emerge like a hologram out of a two-dimensional sheet. New clues have come from the symmetries found on an infinitely distant “celestial sphere.”


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