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  1. Humans

    From the July 3, 1937, issue

    A spectacular freak photograph of a solar eclipse, meteorites as the remnants of lost planets, and inducing dropsy in animals.

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  2. Ecosystems

    Sawfish Central

    Sawfish will soon be getting United Nations protection from exploitation. Right now, the only U.S. state where these ancient fish can generally be found—and then, only rarely—is Florida. Here’s a site to view the fish, a member of the shark family, and link to research aimed at rescuing populations of its seven beleaguered species worldwide. […]

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  3. Math

    Sudoku and Graph Theory

    Solving sudoku puzzles may not require mathematics, but mathematicians have found plenty to say about the popular brainteasers.