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  1. Readers question carbon nanotube transistors and brain organoids

    Readers had questions about carbon nantoube transistors and brain organoids.

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  2. Problem solving and the power of humankind

    Editor in Chief Nancy Shute discusses the AIDS epidemic and a woman who helped define the limits of mathematical understanding in the 20th century.

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  3. Science & Society

    A Dallas museum hosts rare hominid fossils from South Africa

    Fossils of the South African hominids Australopithecus sediba and Homo naledi are on display at the Perot Museum of Science and History in Dallas.

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  4. Health & Medicine

    For people with HIV, undetectable virus means untransmittable disease

    HIV outreach and care in Washington, D.C.,