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Christina Applegate just revealed that she was misdiagnosed with MS in 2021—experts explain why this kind of mistake can happen much more often than you think
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A National Science Foundation grant that helps researchers buy scientific equipment was supposed to open for submissions on October 15. But the date has come and gone, leaving scientists in the dark
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It’s not easy being green if you’re a star—but it’s not impossible, either. A new study of white dwarfs reveals these strange stars can display many odd colors: yellow, pink, purple or even a subtle shade of chartreuse.
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50 years ago The Selfish Gene became an instant bestseller, bringing evolutionary biology back into cultural conversation and catapulting its author, Richard Dawkins, to global fame. Yet today scientists are still debating its core message.
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Here’s why physicists are taking this once-fringe multiverse theory seriously.
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Your brain is a prediction machine. Can it cope with a world in chaos?
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Scientists who previously worked on fusion inside the U.S. nuclear labs and their colleagues built the private company Pacific Fusion. Now the government is turning to their new machines for help conducting research on its nuclear arsenal.
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The ocean’s size makes oceanic carbon removal an enticing method to battle climate change. But researchers are finding that once treated seawater disperses into currents and tides, proving how much CO₂ was removed becomes enormously difficult.
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Come dig into the SciAm archives with us. This month a few of our favorite gems from past November issues include a look at the evidence for life on Mars and our 1876 editors’ exploration of “reprehensible” deception among artificial butter sellers.
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A radical new theory about energy and mitochondria could explain chronic disease and aging.
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The algorithms that run your feeds on social media are like “heat-seeking missiles that identify psychological vulnerability,” one psychologist told SciAm associate editor Allison Parshall.
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Social media addiction is real. Here’s how to get sober.
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Have you ever wondered how uranium enrichment actually works? These graphics explain all.
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Read an original poem about the mathematical power of the number two.
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Play this crossword inspired by the November 2026 issue of Scientific American.
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The universe’s biggest explosions are a puzzle, and understanding what powers them could rewrite physics.
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Are ultraprocessed foods really bad for you? New evidence suggests the “processing” isn‘t the problem.
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Check out how readers responded to our June 2026 issue and other SciAm content in the November 2026 Letters column.
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An AI model can predict whether you’re likely to die of cancer from a single photo of your face, according to new research.
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Little is known about Mars' moons, including how they came into being. Japan's MMX mission is aimed at fixing that, with a plan to return samples of the moon Phobos to Earth in 2031.
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