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  1. Anthropology

    Ancient farmers, foragers kept genes to themselves

    Ancient DNA and diet clues suggest how farmers and hunter-gathers contributed to modern Europeans’ genetic profiles.

    By Bruce Bower
  2. Math

    Twin primes

    Mathematicians have conjectured since Euclid’s time that there are infinite pairs of prime numbers.

    By David Harris
  3. Health & Medicine

    Highlights from annual meeting of infectious disease specialists

    Heartburn pills increase risk of pneumonia, a better catheter and more were presented October 2-6, 2013 at ID Week in San Francisco.

    By Nathan Seppa
  4. Health & Medicine

    Old drug may have new trick

    Parkinson’s medication helps mice with condition that mimics MS.