City Sizes May Affect Blackout Probabilities

The probabilities of electricity blackouts may be influenced by the sizes of cities more than by the details of power grids.

Could Planet Nine Be a Black Hole?

While astronomers look for a ninth planet to explain orbits in the outer solar system, a duo explores the possibility that the mystery object is a primordial black hole.

Powdering Up for Neutrinos

The search for neutrinos from past supernovae is getting an upgrade as Japan’s Super-Kamiokande experiment begins adding gadolinium powder to its giant water-based detector.

Improved Predictions for Superconductors

A refinement of the density-functional theory used to describe conventional superconductors dramatically increases the accuracy of the theory’s predictions.

Searching for Dark Matter in Distorted Starlight

Statistical studies of the motions of millions of stars may reveal the subtle imprint of dark matter.

A High-Energy Take on Black Hole Encounters

A particle physics approach to describing black hole interactions opens up new avenues for understanding gravitational-wave observations.

Real-Time Measurements of Earth’s Spin and Tilt

An array of ring lasers provides the first continuous measurement of Earth’s motion from a single location.

A Speed Test for Ripples in a Quantum System

Settling a theoretical debate, three studies show that there is a maximum speed at which a physical effect can travel through systems of long-range-interacting particles.

Gamma Rays Provide New Quantum Gravity Constraint

An analysis of the speed of the most energetic photons ever observed from a gamma-ray burst sets new constraints on certain theories of quantum gravity.

Follow the Crowd to Find a Smell

Simulations show that by trusting their neighbors and following their own “noses,” a swarm of fictitious organisms inspired by moths can quickly find a smell’s source in turbulent air.

Additional Data Confirms Particle Anomaly

The LHCb Collaboration increases the statistical significance of a result relating to the decay rate of B0mesons that diverges from standard model predictions.

A Shared Quantum Rhythm

Using a light pulse, researchers sync up phases in quantum states of roughly a million rubidium atoms, thus demonstrating quantum synchronization for the first time.

Black Hole Imaging Tests Einstein’s Limits

Sharper images and movies of black holes will allow researchers to probe important physics theories and concepts, including general relativity, in new ways.

A Quantum Signature for the Cosmos

Certain galaxy patterns might encode whether the Universe’s primordial density fluctuations were quantum or classical in nature.

Active Matter that Mimics Turbulence in Space and Time

Despite being driven by a different process, a system of self-propelling particles can evolve over time in a similar way to a turbulent fluid.