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  1. Cosmology

    Scientists mapped dark matter around galaxies in the early universe

    A technique used to reveal dark matter could also shed light on a disagreement about the clumpiness of matter in the cosmos.

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  2. Astronomy

    Mini-Neptunes may become super-Earths as the exoplanets lose their atmospheres

    Starlight is eroding the atmospheres of a handful of gassy exoplanets that are a bit smaller than Neptune, gradually exposing the rocky cores within.

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  3. Readers ask about rogue black holes, zippy neutrinos and more

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  4. Our enduring fascination with outer space

    Editor in chief Nancy Shute discusses science's fascination with space, from 25 years of Mars rovers to the James Webb Space Telescope's mind-blowing first images.