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  1. Health & Medicine

    Critical for Coating: Protein directs nerve-sheath construction

    A protein produced by nerve cells is essential for the manufacture of myelin, the fatty sheath surrounding nerve fibers.

    By Nathan Seppa
  2. Humans

    Letters from the September 10, 2005, issue of Science News

    Pennies in heaven? Why slam a copper impactor into Comet Tempel 1 (“A Grand Slam: In a winning move, NASA probe burrows into a comet,” SN: 7/9/05, p. 22)? Wouldn’t copper vapor contaminate the spray? Why not a high-temperature ceramic? P.M. deLaubenfelsCorvallis, Ore. According to Casey Lisse of the Deep Impact team, copper was chosen […]

    By Science News

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