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  1. Humans

    Irreplaceable Perplexity 101

    An imaginary classroom provides lessons on the all-too-real debate over evolution and intelligent design.

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  2. 19623

    This fine piece about invasive sea squirts states that the critters maintain an unappetizing surface pH of 2. Does this make these mats harmful to touch? Andrew J. DolsonRichmond, Va. Robert Whitlatch of the University of Connecticut, who grows Didemnum in the lab, says it’s fine to handle for short periods of time, “though I […]

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  3. Ecosystems

    Squirt Alert

    A sea animal of unknown origins and lacking any known predator has begun commandeering ecosystems in cool coastal waters throughout the world.

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  4. Humans

    Archival Science

    Photos from the Science Service archive at the Smithsonian offer fresh views of the Scopes evolution trial.