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  1. Astronomy

    Satellite swarms may outshine the night sky’s natural constellations

    Simulations suggest that satellite “mega-constellations” will be visible to the naked eye all night long in some locations.

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  2. Readers discuss ‘uniquely human’ DNA and Mars’ volcanic activity

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  3. A desire for knowledge on many science fronts

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  4. Health & Medicine

    By taking on poliovirus, Marguerite Vogt transformed the study of all viruses

    She pioneered the field of molecular virology with her meticulous lab work and “green thumb” for tissue culture.

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  5. Paleontology

    Fossil tracks may reveal an ancient elephant nursery

    Fossilized footprints at a site in Spain include those of an extinct elephant’s newborns, suggesting the animals may have used the area as a nursery.