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  1. Astronomy

    The only known pulsar duo sheds new light on general relativity and more

    Einstein was right, among other insights gleaned from watching a one-of-a-kind system of two pulsating dead stars for 16 years.

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  2. Astronomy

    The cosmic ‘Cow’ may have produced a new neutron star or black hole

    A bright, mysterious blast of extragalactic light appears to have spawned a small, compact object.

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  3. Anthropology

    2021 research reinforced that mating across groups drove human evolution

    Fossils and DNA point to mixing and mingling among Homo groups across vast areas.

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  4. The triumph and fallibility of science in a historic year

    Editor in chief Nancy Shute discusses the last year in science, including lessons we've learned about COVID-19, human evolution and amazing animal feats.