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  1. Math

    Thirteen Spades

    Poor shuffling can distort play in the game of bridge.

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  2. Humans

    Letters from the January 22, 2005, issue of Science News

    Timely comments The researchers featured in “Summer births linked to schizophrenia” (SN: 11/6/04, p. 301) suggest that a higher incidence of schizophrenia may be due to summer-related infections “or other seasonal factors.” June and July births would have been in early gestation during late fall and winter, when there is increased incidence of depression among […]

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  3. Humans

    From the January 19, 1935, issue

    Unusual twin girls, recording brain waves, and making heavy hydrogen.

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  4. Planetary Science

    A Year on Mars

    Catch up with the amazing, ongoing adventures of the rovers Spirit and Opportunity, still ticking on the surface of Mars.