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  1. Space

    Stars’ missing elements could signal lurking small planets

    The sun's chemistry suggests some good other places to hunt for rocky orbs.

    By Nadia Drake
  2. Health & Medicine

    Low-cal longevity questioned

    Limited food intake in rhesus monkeys fails to extend the animals’ survival, in a departure from earlier reports.

    By Nathan Seppa
  3. Space

    Highlights from the IAU Meeting

    A collection of reports from the 28th General Assembly of the International Astronomical Union, Beijing.

    By Nadia Drake
  4. Health & Medicine

    Brain learns while you snooze

    Mind can make associations between smells and sounds during sleep.

    By Laura Sanders
  5. Humans

    Young scientists make the cut

    With the naming of the 30 finalists, middle school students will vie for top prize in national Broadcom MASTERS competition.