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  1. Earth

    Ill Winds

    Research suggests that the long-range movement of dust can sicken wildlife, crops—even humans—a continent away.

    By Janet Raloff

  2. From the October 3, 1931 issue

    A SEA-GOING LIZARD FROM GALAPAGOS When Darwin, as a young naturalist just out of school, visited the Galpagos islands, he saw a number of things that helped to crystallize and precipitate in his mind the concept, already seeded there, that later revolutionized all biology and much of philosophy. Not the least provocative of speculation was […]

    By Science News
  3. Math

    Knot Views

    Interested in playing around with some mathematical knots? Manuel Arala Chaves of the University of Porto in Portugal has created a table illustrating all 75 knots with up to 9 crossings in their standard representation.