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  1. Archaeology

    Complex supply chains may have appeared more than 3,000 years ago

    Finds from one of the world’s oldest shipwrecks hint that miners in Central Asia and Turkey provided a crucial metal to Mediterranean rulers.

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  2. Readers discuss swimming sperm, a fishing fox and more

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  3. Physics

    Here’s how to make a fiber-optic cable out of air using a laser

    A hollowed-out laser beam heats a tube of air that surrounds cooler air, providing a way to guide light much the way fiber optics do.

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  4. Seeking the elements that make modern life possible

    Editor in chief Nancy Shute discusses the importance of rare earth elements to society.