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Scientific American

Gemstones on Mars—why the Red Planet could be harboring rubies, opals, and more

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Is the U.S. in a new era of political violence? Experts say it’s complicated

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Sucker fish are hiding in manta rays’ ‘butthole,’ new study reveals

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Strange crystals found inside wreckage from the first nuclear bomb test

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See the National Park Service’s newest canine rangers

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Tanking is ruining NBA basketball. Can math save it?

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Inside NASA’s ‘very ambitious’ moon base plan

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Protein-boosted foods are everywhere now, but do we actually need more protein?

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This sulfurous hell world might change the way we classify exoplanets

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Hantavirus cruise ship outbreak, risk of microplastics-caused climate warming and Alaska landslide tsunami

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National Academies experts denounce Trump’s NSF board purge

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Is testosterone therapy safe and effective? What we know

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The mangled remains of probes sent to Venus may still be there

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Celebrate Mother’s Day with nine bold, beautiful and bizarre animal moms

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