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  1. Gene variants shield against depression

    Some child-abuse victims possess specific variations in a stress-regulating gene that decrease their likelihood of developing moderate or severe depression as adults, a research team reports.

    By Bruce Bower
  2. Health & Medicine

    Nurturing Our Microbes

    Nurturing the microbes living in the human body can pay dividends—from shortening the length of colds to fighting obesity and osteoporosis.

    By Janet Raloff

  3. Micromanagers

    Some scientists believe the human brain is the creation of RNA. Only noncoding RNAs are plentiful, and powerful enough to handle the billions of complex interactions the brain faces every day.

    By Tina Hesman Saey
  4. Math

    A Mathematical Tragedy

    Sophie Germain had a bold program to prove Fermat's Last Theorem, but it was doomed to fail.