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    Lead becomes stronger than steel under extreme pressures

    Lead performs under pressure. Under normal conditions, the metal is relatively soft, easily scratched with a fingernail. But when compressed under extreme pressures, lead becomes hard and strong — even stronger than steel, scientists report November 11 in Physical Review Letters. To study how lead’s strength changed under pressure, researchers rapidly compressed a lead sample […] More

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    A new cooling technique relies on untwisting coiled fibers

    A new way to chill out is simple: Just unwind. Called twistocaloric cooling, the method involves unwinding tightly twisted strands of various materials. The technique was used to chill water by several degrees Celsius, scientists report in the Oct. 11 Science. Cooling techniques like those used in traditional refrigerators rely on cycles of compressing and […] More