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A child in sunglasses has dental tools inserted in mouth by practitioner wearing blue gloves.

Health & Medicine

Two cities stopped adding fluoride to water. Science reveals what happened

As calls to end fluoride in water get louder, changes to the dental health of children in Calgary, Canada, and Juneau, Alaska, may provide a cautionary tale.

By Alex Viveros28 minutes ago

15 milliliter plastic vials with light blue screw tops partially filled with milk stand in a cardboard containers. On the side in black marker is written Flu Milk Collection. These samples are waiting to be tested for H5N1 bird flu in dairy cattle.

Health & Medicine

Bird flu in cows shows no signs of adapting to humans — yet

By Tina Hesman Saey2 hours ago

A fossilized ancient rhino lays embedded in the ground at the Ashfall research site, surrounded by other fossils

Ancient, water-loving rhinos gathered in big, hippolike herds

By Jake BuehlerApril 25, 2025

Photo of watersmeet Gneiss rock that could be the oldest known in the United States

Earth

The United States’ oldest known rock has existed for at least 3.6 billion years

By Evan HowellApril 25, 2025

Six caterpillar cases covered in spikey body parts of insects and spiders.

Animals

This caterpillar wears the body parts of insect prey

By McKenzie PrillamanApril 24, 2025

The Hubble Space Telescope being deployed from a space shuttle into orbit, with solar panels extended against the black backdrop of space and the sun shining brightly behind the observatory.

Space

See how the Hubble Space Telescope is still revolutionizing astronomy

By Katherine KorneiApril 24, 2025

A drawing of Roman gladiators holding knives over a lion in an arena

A lion’s bite marks a fatal fight with a possible Roman-era gladiator

By Bruce BowerApril 23, 2025

We summarize the week's scientific breakthroughs every Thursday.

Spotlight on Health

15 milliliter plastic vials with light blue screw tops partially filled with milk stand in a cardboard containers. On the side in black marker is written Flu Milk Collection. These samples are waiting to be tested for H5N1 bird flu in dairy cattle.

Bird flu in cows shows no signs of adapting to humans — yet

Easy replication in cattle mammary glands means H5N1 bird flu is under no evolutionary pressure to adapt to spread easily in humans.

By Tina Hesman Saey2 hours ago
Autism rates rose again. Experts explain why
Clinical trials face uncertain futures amid Trump cuts

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Science News Magazine

Cover of Science News' May 2025 issue featuring a Spinosaurus on the cover

May 1, 2025 Vol. 207 No. 5

Featured Media

Six caterpillar cases covered in spikey body parts of insects and spiders.

This caterpillar wears the body parts of insect prey

Dubbed the “bone collector,” this caterpillar found on a Hawaiian island disguises itself while stalking spider webs for trapped insects to eat.

An artistic rendering of communal hunting, showing people with spears and horses.

Ancient horse hunts challenge ideas of ‘modern’ human behavior

Illustrated closeup of a $100 bill with Benjamin Franklin wearing a mask over his nose and mouth. COVID-19 is written in the corner.

Clinical trials face uncertain futures amid Trump cuts

An illustration of a Spinosaurus swimming in the water next to Cretaceous-era fish

Could Spinosaurus swim? The fierce dinosaur ignites debate

A bat flies in a cave very close to a rocky ceiling.

Bats wearing tiny mics reveal how the fliers avoid rush hour collisions

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Life

Gila monsters may struggle to survive climate change

By Jake BuehlerApril 4, 2025
Dark coats may have helped the earliest mammals hide from hungry dinosaurs

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Humans

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Climate

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Astronomy

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Physics

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The sound of clapping, explained by physics

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Health & Medicine

A messed-up body clock could be a bigger problem than lack of sleep

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A drug for heavy metal poisoning may double as a snakebite treatment

By Aimee CunninghamApril 15, 2025
Three U.S tick species may cause a mysterious red meat allergy

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Earth

The ozone layer shields life on Earth. We’ll soon lose a key way to monitor its health

By Nikk OgasaApril 4, 2025
More details about the Myanmar earthquake are emerging

By Carolyn GramlingApril 1, 2025
3 things to know about the deadly Myanmar earthquake

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Science & Society

Federal cuts put help for mental health and drug addiction in peril

By Laura SandersApril 14, 2025
‘Pseudoscience’ digs into the allure and dangers of believing fake science

By Sibani RamApril 14, 2025
5 years after COVID-19 became a pandemic, are we ready for what’s next?

By McKenzie PrillamanMarch 10, 2025