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Researchers have discovered how polycyclic aromatic hydrocarbons survive the harsh environment of space. When hit by a UV photon, the molecules promptly fluoresce to shed some of the energy that would otherwise shake them apart. go.aps.org/45L5FCt

After measuring the wobbles of 300 billion muons, the Muon g − 2 Collaboration has pinpointed the particle's internal magnetism. The experiment’s final results line up with the most recent predictions, validating the standard model of particle physics. go.aps.org/3SMDrQm

Researchers have fabricated a liquid-crystal-based topological system, called a combinatorial vortex lattice, that is easy to manipulate using laser tweezers. The lattices could potentially be used to store information and perform logic operations. go.aps.org/4mWDlmK

Among the proposed add-ons to the standard model of particle physics is a fifth force coupling electrons to neutrons. Researchers have put new upper limits on the force’s strength by measuring differences in transition frequencies among calcium isotopes. go.aps.org/4kTywtn

Why do numerical simulations underpredict the size of turbulent plasma in a tokamak? Using a first-principles model, researchers have attributed the discrepancy to instabilities at the plasma’s outer boundary, which had not been fully accounted for. go.aps.org/4kVqQGo

OLED TVs offer sharp images, high refresh rates, and wide viewing angles at the expense of short device lifetime and low brightness. Now researchers have clarified the processes responsible for those shortcomings. go.aps.org/43GkWDh

If you’ve seen Romeo and Juliet, you likely can summarize the plot in a single sentence that appears nowhere in the play. A new physics-inspired theory aims to explain our story-recalling ability by modeling the memory of a story as a hierarchical tree. go.aps.org/45SUlnR

Researchers have accelerated muons in a radio-frequency device for the first time. Muon beams have previously been accelerated using electrostatic fields, but such methods can’t reach the >100 MeV particle energies where new physics could appear. go.aps.org/43KDHWd

Researcher Antoine Vendeville used a database of Twitter activity to evaluate the ability of a popular network model, called the voter model, to predict the outcome of the unusually fluid French presidential election of 2017.

Some cells move with a mix of self-propulsion and Brownian motion. Researchers have now shown that these factors can be separated in motion-tracking data. The study revealed a surprise: Genetically identical cancer cells exhibited a range of behavior. go.aps.org/45v1N8O

Researchers have demonstrated a new faster and more accurate technique for reading out the quantum state of a single atom. The key ingredient is a way to boost the atom’s rate of photon emission. go.aps.org/4eiaq9a

Researchers have induced light to organize itself into specific patterns of pulses as it circulates within a pair of optical fiber loops. The key ingredient is a version of a predicted phenomenon—the non-Hermitian skin effect—that has not been seen before. go.aps.org/3FWRCiV

Perched high in the Chilean Andes, the Vera C. Rubin Observatory is designed to capture the most expansive view of the night sky ever recorded—creating a vast, time-lapse 3D movie of the Universe. The observatory’s first images have just been released. go.aps.org/3FUgzLX

Researchers have developed a set of equations to describe fast muddy debris flows. Their model captures the dynamics of roll waves, a fluid-mechanical instability that causes surface waves to propagate in the direction of the flow. go.aps.org/40kvfL7

The Ginzburg-Landau theory of phase transitions assumes that one of its key variables, the order parameter, has trivial topology. Now researchers have shown that order parameters can have hidden topological structure. go.aps.org/4egFqpJ

The human gut abounds in bacteria. Researchers have now proposed a detailed biophysical model of the gut environment. Using the model, they pinpoint how nutrient supply, digestion, and other fluctuating factors affect the gut microbiota population. go.aps.org/4k9G9KM

Pulsed lasers measure the Earth–Moon distance with 5–10 mm accuracy. Now a researcher has proposed a path to greater precision by replacing the pulses with a continuous high-power beam. If realized, the technique could reveal details of the lunar interior. go.aps.org/3I1tCM4

Researchers have now made the process of encrypting and decrypting a quantum key more efficient by generating it using a semiconductor quantum dot rather than a laser. The team demonstrated the method by sharing a quantum key between buildings at USTC. go.aps.org/4l7Suk8

Researchers have used NV centers in a diamond anvil cell to map the magnetic field contorting around a cuprate superconductor under a pressure of 4 GPa. Next up: using the technique to study nickelates and hydrides that superconduct only at high pressures. go.aps.org/4lirH4o

Researchers have applied a magnetic field to a layered material to create a system that exhibits much higher emissivity than absorptivity in the same direction, paving the way for new thermal diodes, radiative heat engines, and infrared camouflage. go.aps.org/3TfEhFx