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  1. Humans

    From the April 2, 1938, issue

    The science of tall tales, a fluorine-spouting volcano under ice, and viruses show signs of life.

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  2. Animals

    Comb jellies take root in a new tree of animal life

    A team of biologists places comb jellies, not sponges, at the base of a new tree of animal life.

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  3. 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.

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  4. 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.