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A popular sunscreen ingredient can finally be sold in the United States

A new method could spot fentanyl variants no one has cataloged yet

Crossword: Power play

Here’s what would happen if you tried to break a photon in half

No, mastic gum won’t reshape your jaw

Songs prep the brains of finches yet to hatch for a hot world

Measles has no treatments. Changing that may not be easy

Clocks made from an atomic nucleus just ticked on for the first time

Neuroscientists left the lab to study memory loss. The results were surprising

A new guideline links care for heart, kidney and metabolic diseases

Earth’s stratosphere is a mysterious superhighway for microbes

Sleep and exercise may dampen genetic drivers of heart disease

Engineered hookworms could one day dispense drugs from inside your gut

Frozen squirrel poop hints at sights and smells of Ice Age ecosystems

These birds clack their wing bones together to woo mates at night

Some pterosaurs may have boasted bold iridescence

A drug may help people on GLP-1 meds preserve muscle

AI cracked an Erdős math problem. Now experts want guardrails

NASA declares MAVEN, its Mars atmosphere orbiter, dead

Honeybees and shrimp are now getting vaccinated

This tiny, blue octopus is new to science

Remote workers feel isolated. Back-to-office mandates are not a fix

Bumblebees can solve problems on their own

Even quiet black holes create winds, new Milky Way observations reveal

A secret to making a queen bee may lie in the wax around it

Curbing Congo’s Ebola outbreak is hampered by unknowns about the virus

Ötzi the Iceman’s remains yielded ‘viable’ yeasts in the lab

Microsoft’s quantum chip got an upgrade. Critics are still skeptical

The math of choosing a restaurant meal is revealed in Richard Feynman’s notes

More young people are looking to AI chatbots for mental health help

A tiny part of your brain may still listen under anesthesia

A new pancreatic cancer pill may be a game changer for patients

Here’s how to make an origami torus with the fewest folds possible

Europa may not vent water into space after all

Homing pigeons may use a surprising navigation mechanism

Can DEET attract mosquitoes? A lab study offers clues

A $4 tongue swab test detects tuberculosis within 30 minutes

Huge volcanic eruption offers clues to fighting climate change

Grapefruit-sized hail may become more common in a warmer world

AI bots ignore evidence. Can we trust them with science?

Solar flares may show predictable warning signs hours before erupting

Why is hantavirus so deadly? It’s not what you may think

Even careful scuba divers can damage coral reefs

The science of us

Physics explains why gold stays pristine

Congo prepared for Ebola. Now a rare strain is exposing gaps in readiness

Ultrasound aimed at the brain offers new hope for Parkinson’s patients

How house design can curb childhood illnesses in Africa

Math puzzle: The Ant Goes Marching

New tools may help diagnose Parkinson’s earlier than ever