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  1. Humans

    Letters from the November 4, 2006, issue of Science News

    Twisted logic? I have a question concerning “The Sun’s Halo in 3-D” (SN: 8/19/06, p. 120). It says, “As the sun rotates, its polar regions make a complete circle in about 34 days, compared with the 25 days required by its equator.” I was wondering how it’s possible to have two points on a rotating […]

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  2. Humans

    From the October 24, 1936, issue

    A sugarcane jungle, stopping cancer growth with diet, and an insect-killing fungus.

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  3. Earth

    Encyclopedia of Earth

    The Encyclopedia of Earth is an online source of environmental information that features objective, authoritative articles written and reviewed by an international community of experts.