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  1. Health & Medicine

    Finding common ground can reduce parents’ hesitation about vaccines

    Physicians are examining whether discussing shared health goals can bring vaccine-hesitant parents on board.

    By Aimee Cunningham
  2. Paleontology

    Signs of red pigment were spotted in a fossil for the first time

    For the first time, scientists have identified the chemical fingerprint of red pigment in a fossil.

    By Carolyn Gramling
  3. Animals

    Bad moods could be contagious among ravens

    Ravens may pick up and share their compatriots’ negativity, a study on the social intelligence of these animals suggests.

    By Carolyn Wilke
  4. Physics

    The kilogram just got a revamp. A unit of time might be next

    After years of preparation, new definitions for the basic units of mass, temperature and more have now gone into effect.