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  1. Climate

    Why won’t this debate about an ancient cold snap die?

    Critics are still unconvinced that a comet caused a mysterious cold snap 12,800 years ago.

    By Carolyn Gramling
  2. Life

    Zika gets the most extreme close-up of any flavivirus

    The closest look yet at Zika virus may reveal some vulnerabilities.

    By Tina Hesman Saey
  3. Neuroscience

    Watch the brain jiggle with each heartbeat

    A new twist on MRI can reveal how the brain wiggles.

    By Laura Sanders
  4. Health & Medicine

    ‘Aroused’ recounts the fascinating history of hormones

    The new book "Aroused" demystifies hormones, the chemicals that put the zing into life.

    By Erika Engelhaupt
  5. Earth

    This volcano revealed its unique ‘voice’ after an eruption

    Identifying patterns in a volcano’s low-frequency sounds could help monitor its activity.