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  1. Humans

    From the May 30, 1936, issue

    A shaking mountain, a warm blood factory, and signaling with invisible heat rays.

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  2. Physics

    String Trio: Novel instrument strums like guitar, rings like bell

    A new type of musical instrument, equipped with Y-shaped strings, may be the first of a family of string instruments with unusual overtones typically heard in bells or gongs.

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  3. Archaeology

    Stones of Contention: Tiny Homo species tied to ancient tool tradition

    Controversial new discoveries suggest that our half-size evolutionary cousins who lived on the Indonesian island of Flores as recently as 12,000 years ago carried on a stone-toolmaking tradition passed down from the island's original colonizers more than 700,000 years ago.