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Scientific American

Whatever happened to the ozone hole, acid rain and DDT?

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This Earth Day, three experts share tips on how to feel hopeful about the environment

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Gibraltar macaques are self-medicating with dirt to help them digest human. junk food

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Mathematicians found out why waiting for the elevator takes forever

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The quantum arrow of time can be reversed, physicists show

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Former NASA astronauts launch new group to promote U.S. constitutional values

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NASA just dropped a stunning new Hubble image of a ‘Cosmic Sea Lemon’ 5,000 light-years away

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FBI investigating possible links between deaths and disappearances of at least 10 scientists

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Why firstborns may be more likely than secondborns to be autistic or to have allergies

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Hegseth says U.S. military no longer requires flu vaccination, drawing criticism from health experts

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Trump’s order on psychedelics could have far-reaching science consequences

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NASA’s 2028 moon landing may be delayed because of lack of space suits, watchdog report warns

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Astronauts’ brains don’t fully adapt to life in microgravity, new study finds

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Risk of ‘megaquake’ in Japan higher after powerful earthquake strikes

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NASA’s Voyager 1 spacecraft down to just two working science instruments

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The strange way cocaine water pollution is changing salmon

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See Bruce the parrot wield his broken beak like a deadly weapon

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Magnetic muon measurements and gene-therapy advances win $3 million Breakthrough prizes

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Ancient Roman ‘machine-gun’ damage discovered on Pompeii walls

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‘Cocaine hippos’ raise tough questions, and scientists uncover insights on faster aging and heart risks

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See the spectacular Lyrid meteor shower at its peak

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Why game theory could be critical in a nuclear war

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How a Renaissance gambling dispute spawned probability theory

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Master of chaos wins $3-million math prize for ‘blowing up’ equations

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The science behind the peptide craze

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NSF awards record number of coveted Ph.D. fellowships in surprise move

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Did AI just solve the mystery of one of El Greco’s most enigmatic paintings?

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Songbirds reveal the dark side of making new brain cells as adults

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What’s the weirdest planet in the solar system?

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What is Mythos and why are experts worried about Anthropic’s AI model

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How your body and brain construct chronic pain

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Mars orbiter watches mysterious wave of darkness spread across red planet’s surface

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AI music is reviving the same fights that shaped the player piano

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Why birds were the only dinosaurs to survive Earth’s worst day

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Former deputy surgeon general Erica Schwartz nominated as new CDC chief

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NASA Artemis II astronauts say thank you to the world

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Congress grills RFK, Jr., about vaccines and cuts to health budget

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How the Grand Canyon formed is a surprisingly messy story. Here's the latest clue

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Astronomers just finished the biggest, sharpest 3D map of the universe—and it’s beautiful

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Elizabeth Roboz Einstein—the determined genius behind a multiple sclerosis breakthrough

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Secrets of cosmic evolution may lurk in this black hole’s ‘dancing’ jets

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10 dinosaur science books recommended by a paleontologist

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How far from humanity were the astronauts of Artemis II? The answer will surprise you

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Effect of antiamyloid Alzheimer’s drugs ‘absent or trivial,’ Cochrane review finds

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The Trump administration is looking to experts to weigh in on peptides

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When a naked mole rat queen dies, that usually means war—but not for this colony

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NASA needs nuclear power for its moon base. Here’s the White House plan to get it

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Why do older people have fewer seasonal allergies?

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250-million-year-old fossil proves mammal ancestors laid eggs

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A face-swapping illusion can unlock childhood memories

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