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  1. Readers discuss corn debris biofuel, the color of ancient Mars’ oceans and more

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  2. What can science tell us about living a good life?

    Editor in chief Nancy Shute discusses what science can tell us about finding fulfillment, even in disastrous times

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  3. Health & Medicine

    How personalized brain organoids could help us demystify disorders

    Personalized clusters of brain cells made from people with Rett syndrome had abnormal activity, showing potential for studying how human brains go awry.

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  4. Physics

    New ‘vortex beams’ of atoms and molecules are the first of their kind

    Twisted beams of atoms and molecules join other types of corkscrew beams made of light or electrons.