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  1. Astronomy

    These chip-sized spacecraft are the smallest space probes yet

    Space initiative dubbed Breakthrough Starshot sent the smallest spacecraft yet into orbit around Earth.

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  2. Health & Medicine

    Birth control research is moving beyond the pill

    After decades of research, reproductive biologists are on the verge of developing new birth control options that stop sperm from maturing or save a woman's eggs for later.

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  3. Anthropology

    Some secrets of China’s terra-cotta army are baked in the clay

    Specialized production system lay behind the famous terra-cotta troops found in ancient Chinese emperor’s tomb.

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  4. Astronomy

    On a mountain in Wyoming, the eclipse brings wonder — and, hopefully, answers

    Astronomy writer Lisa Grossman joined scientists on a mountain in Wyoming who were measuring the corona using four different instruments to try to figure out why it’s so hot.