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  1. Paleontology

    Salty Old Cellulose: Tiny fibers found in ancient halite deposits

    Researchers have recovered microscopic bits of cellulose from 253-million-year-old salt deposits deep underground.

    By Sid Perkins
  2. Health & Medicine

    Curbing Chemo: Fasting cushions drug’s side effects in mice

    Two days of starvation kicks mice's cells into repair mode and helps them endure high doses of chemotherapy.

    By Patrick Barry
  3. Math

    Creeping Up on Riemann

    Theorists find the first example of an elusive complex function that just may help them solve the biggest problem in mathematics.

    By Julie Rehmeyer
  4. Animals

    Night Flights: Migrating moths may use a nighttime compass

    Silver Y moths choose to fly when wind blows in the same direction that they migrate, and they may even compensate when the wind pushes them off-course.