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Researchers Claim to Have Solved the Perplexing ‘Reverse Sprinkler’ Problem That Stumped Feynman

KENNETH CHANG

Physicists have debated which way a submerged sprinkler sucking in water would spin. Careful experiments provide an answer.

Mary-Dell Chilton Dies at 87; Helped Create First Genetically Modified Plant

JERÉ LONGMAN

In 1982, she led the research team that figured out how to genetically alter plants, a discovery that would eventually transform global agriculture.

An Extraordinary White House Meeting

DAVID GELLES

A new book sheds light on President Trump’s affinity for fossil fuels.

Burning Houses to Save Houses

MIRA ROJANASAKUL

We visited researchers seeking ways to make homes safer. They set a lot of fires.

Why Does Wildfire Smoke Turn the Sky Orange?

KATRINA MILLER

It’s about how light scatters in our atmosphere.

SpaceX’s latest Starship launch attempt ends in a scrub

SpaceX's first attempt to launch its Starship megarocket on its thirteenth flight test ended before it could properly begin, aborting just before liftoff

Meet Earth’s Newest Monkey. (And Check Out Its Orange Lips.)

KATE GOLEMBIEWSKI

It is only the fifth new African monkey identified as a new species in the past 75 years.

Cyclospora outbreak linked to iceberg lettuce supplied to Taco Bell

U.S. officials have traced an explosive diarrhea-causing parasite outbreak in five states to shredded lettuce served at the popular fast-food chain

Ancient Egyptian princesses were ‘powerful’ weapon users, new analysis suggests

These findings challenge a long-held belief about weapons found in female burial sites

Permanent daylight savings is bad for Americans’ health—here’s what science says could be better

More sunlight in the evenings doesn't always equate to better health

What’s the longest total solar eclipse?

Duration, location, aviation: What makes the best possible view of a total solar eclipse?

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.