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  1. Health & Medicine

    Take a Breath: Fatty substance may play role in cystic fibrosis

    A fatty compound called ceramide that accumulates in lung cells may be instrumental in the devastating disease cystic fibrosis.

    By Nathan Seppa
  2. Health & Medicine

    Traveling Toxin: Botox may hitch a ride on nerve cells

    New evidence suggests that Botox migrates from the injection site, perhaps traveling along nerve cells.

    By Rachel Ehrenberg
  3. 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
  4. 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.