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Scientific American

Everyone alive may carry DNA from a ‘ghost lineage’ of human ancestors

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Chilean mummies reveal a lost lineage of smallpox

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3 charts show how extreme heat is costing us hours of lost sleep

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Spacecraft will swarm asteroid Apophis during fateful 2029 Earth flyby

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Bizarre new material discovered in Hiroshima bombing debris

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Hundreds of ancient, never-before-seen ‘earthworks’ discovered in the Amazon

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A unique cellular trick may explain octopus intelligence

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Astronomers spot best-yet example of a wandering supermassive black hole

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Rescue mission to save NASA’s Swift space telescope is imperiled in orbit

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Neuroscientists pinpoint how smells bring back childhood memories

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Avocado flowers switch sex daily—now we know why

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The ultimate science summer reading list

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Math’s acclaimed ‘einstein tile’ finds a new home among physicists

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Why Einstein's theories of relativity make time travel possible

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How mental exhaustion changes the choices you make

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Scientists get best-yet glimpse of Betelgeuse’s companion star

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What caused the magnitude 6.8 earthquake in Japan?

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Has NASA already found life on Mars?

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Can bees sense magnetic fields?

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The best science books to read this summer, according to Scientific American editors

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550 years later, scientists claim to have solved what killed Botticelli’s muse

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The math of traffic jams and how to avoid them

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SpaceX launches Starship on successful test flight

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Fungus-made fashion—researchers turn living organisms into textiles

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NHTSA considers new car door safety rules after fatal Tesla crashes

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When will the cyclosporiasis outbreaks end?

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Europe’s heat waves are killing thousands—and wringing its soils dry

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How a 99-year-old mathematician unraveled a century-old braid mystery

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Is it possible to regain a sense of smell? These scientists are working on it

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The Rubin Observatory’s greatest legacy will be this ‘movie’ of the sky

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Sunlight benefits and risks: what science says about healthy sun exposure

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How lost shipping containers helped map the world’s ocean currents

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Ancient geology could insulate Iran’s nuclear centrifuges under Pickaxe Mountain from bombing

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Transplanted testicular tissue grew sperm in an infertile patient

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Why environmental groups are suing over SpaceX’s land swap deal

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Why don’t insects live in the ocean?

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Humans may have spoken 10 times as many languages 2,000 years ago

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Why Tom Hiddleston finds Pompeii so haunting—and so human

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China’s Kimi K3 and the rise of open-weight AI models

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2026 Fields Medals go to four young mathematicians

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Do animals act weirdly during a solar eclipse? Or do we?

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Watch orcas smashing fish to smithereens, possibly for fun

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U.S. pledges $5 billion to boost AI in government-backed scientific research

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Long-lost coral reefs rediscovered off the coast of Africa

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What OpenAI’s rogue agent really did in the Hugging Face hack

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A huge cosmic object could force astronomers to rethink what a moon is

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These whales are the only ones that flip upside down. Now we know why

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OpenAI admits its agent went rogue and hacked AI start-up Hugging Face

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Mesmerizing NASA time-lapse reveals Mars’s craters, polar ice caps and deserts

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