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  1. Health & Medicine

    Stroke victims with busy immune responses may also see mental declines

    A small study links an active immune response soon after a stroke with a loss in cognitive ability a year later.

    By Aimee Cunningham
  2. Health & Medicine

    50 years ago, doctors lamented a dearth of organ donors

    Fifty years ago, surgeons’ supply of heart donations was woefully low.

    By Maria Temming
  3. Astronomy

    One of the strongest known solar storms blasted Earth in 660 B.C.

    Ice cores and tree rings reveal that Earth was blasted with a powerful solar storm 2,610 years ago.

    By Carolyn Gramling
  4. Animals

    The first male bees spotted babysitting are mostly stepdads

    Some male bees guard young that are likely not their own while mom looks for pollen, a study finds.