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See unprecedented images of Sunda clouded leopards, the ‘ghosts of the forest’

New, never-before-seen images provide a glimpse into the secretive lives of a clouded leopard species found in the dense rainforests of Borneo and Sumatra

U.S. cities have the worst air quality in the world right now—here’s how to stay safe

Wildfire smoke may be as much as 10 times more dangerous than other forms of air pollution, research suggests

The Latest Texas Floods Tested Warning Systems. This Time, They Passed.

SCOTT DANCE AND EDGAR SANDOVAL

A lack of sirens and flood forecasting systems made the state’s Hill Country vulnerable to deadly floods last summer. That has changed.

Rare Pair of Improbably Light ‘Super-Puff’ Planets Is Discovered

REBECCA DZOMBAK

They’re less dense than cotton candy, and they will help astrophysicists better understand the most unusual ways giant planets can form.

A Mathematical Tribute to the Soccer Ball

SIOBHAN ROBERTS

As the World Cup final approaches, take a moment to appreciate the beautiful symmetries of humanity’s favorite truncated icosahedron.

Rudolph Marcus, Who Illuminated Electrochemical Processes, Dies at 102

DYLAN LOEB MCCLAIN

He received a 1992 Nobel Prize for developing a theory that explained fundamental processes behind photosynthesis, respiration, oxidation and even how fireflies produce light.

Why New York State imposed a data center moratorium

The nation's first statewide moratorium on new hyperscale facilities gives officials up to one year to work out how to measure their environmental effects amid the AI building boom

Accidental mix-ups of sounds reveal how the brain produces speech

Spoonerisms are among the most well-known speech errors, and for linguists and psychologists they offer a glimpse into how our brains produce speech

As Natural Disasters Expand, a Disaster-Tracking App Is Booming

SCOTT DANCE

Known for tracking California wildfires, Watch Duty is moving beyond that mission. Millions of people are turning to it for help.

Taylor Farms Expands Iceberg Lettuce Recall to 27 States Amid Cyclospora Outbreak

CHRISTINA JEWETT AND JULIE CRESWELL

The implicated products were marketed under several brands, and had been shipped as recently as Thursday.