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  1. 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.

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  2. If Your Poinsettia Sneezes. . .

    For a winter holiday treat, try the vividly illustrated pages from the American Phytopathological Society on the poinsettia and its history and diseases. The Web site begins with the tale of how a Mexican beauty of limited range grew into the United States’ best-selling flowering plant. Subsequent pages document the abundant spots, rots, and other […]

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  3. Astronomy

    A night of shooting stars

    Thousands of people in North America who got up early on Nov.