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In Review

Animals use physics? Let us count the ways

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

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.

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.

Physicists probe validity of Einstein’s gravity on cosmic scales

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

A quantum origin for spacetime

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

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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