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  1. Astronomy

    Galileo catches Io in a slump

    Galileo spacecraft images show for the first time that material has slid downward along a cliff on Jupiter's moon Io.

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  2. From the December 19 & 26, 1931, issues

    SANTA CLAUS CAVALRYMEN BESTRIDE STRANGE STEEDS Captain Jinks of the Horse Marines bestrode an unfamiliar steed; but the gentleman in the cover picture mounts one more unfamiliar still. He might qualify as a trooper in the Santa Claus Cavalry, for he is mounted on a reindeer. According to the U.S. Biological Survey, reindeer are used […]

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  3. Astronomy

    Observing the sun’s magnetic pull

    A spacecraft studying the sun has spotted clouds of gas that seem to be headed the wrong way, falling back toward the solar surface instead of continuing to move outward with the stream of charged particles known as the solar wind.