PNAS Nexus · 29 August 2026 · From issue 30

Civilianized safety practitioners reduce crime and disorder: Evidence from a quasiexperimental evaluation in San Francisco

Unarmed civilian safety workers cut crime at San Francisco intersections without using police force.

Forrest Stuart, Caylin Louis Moore et al.

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Also in issue 30 15 papers

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In mice, a specific brain circuit controls how fast antidepressant treatments work.
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Water waves flowed almost untouched through a specially patterned messy surface instead of scattering.
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A computer program calculates how easily each tiny part of a protein opens, even in huge proteins.
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In yeast, mice, and human cells, altered proteins caused far more DNA breaks and more cell death.
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In plants, a cell scaffolding protein has a hidden second job turning on defense genes.
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In mice, social rank stays stable even when group members change.
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In rats, estrogen reduced fatty liver damage caused by low testosterone and a bad diet.
PNAS Nexus
A math model tracking real-time events ranks influence better than fixed, static network scores.
PNAS Nexus
In a lab experiment, twisted laser light let scientists steer electric currents inside a carbon sheet.
Nature Physics
Children of mothers with severe obesity had nearly double the risk of early death.
PLOS Medicine
Solar farms in northern China's deserts also cut nearby dust air pollution, a computer model shows.
Geophysical Research Letters
In a solar simulation, a sun jet appears to fade just because it breaks into threads too thin to see.
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