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1932

Physical World

Animation visualizes one electron orbiting a proton along a specified orbit.

Pursuing the electrical fluid: How scientists discovered the electron

A celebration of 2025 as the International Year of Quantum Mechanics and Science would be remiss without a look at how the carrier of electricity finally yielded its secrets — paving the way to the quantum era

Colorful visualizations of Calabi Yau surfaces suggest many possible geometries, represented as a variety of intricately twisted and folded shapes.

String theory is not dead

Out of the limelight, theoretical physicists seek the math that can explain the universe’s particles and forces

Stop motion photo shows how a cat twists and turns during a fall so that it can safely land on its feet.

Animals use physics? Let us count the ways

Cats twist and snakes slide, exploiting and negotiating physical laws. Scientists are figuring out how.

Digital artwork, one in a series displayed at CERN in Geneva. The foreground shows a particle collision event which is a possible candidate for a decay of the Higgs-like particle to a final state. The background depicts selected pages from articles published by the CMS collaboration at the LHC.

Why some artificial intelligence is smart until it’s dumb

Machine learning has found uses in fields as diverse as particle physics and radiology, and its influence is growing. But so is the understanding of its limits.

Processed color view of Jovian moon Europa showing cracks, ridges and disrupted terrain on the icy surface. From Galileo spacecraft.

New projects broaden the search for alien signals from space

A longer list of Earth-like planets, eavesdropping on radio waves and looking for laser light shows: All raise the chances of detecting E.T.

Spectrogram shows a subtle, curved signal discernible from background noise.

Physicists probe validity of Einstein’s gravity on cosmic scales

New tests could verify general theory of relativity, or find flaws

Illustration shows how the mass of a large star warps the flat geometry of spacetime, illustrated as a contoured space.

A quantum origin for spacetime

Physicists find hints that entanglement explains Einstein’s equations for gravity

Heterostructures get a quantum buildup

Heterostructures get a quantum buildup

A summary of “Quantum-Matter Heterostructures” by H. Boschker and J. Mannhart that appears in the 2017 Annual Review of Condensed Matter Physics

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