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Superconductor has odd electron pairing

A humble metallic powder made headlines last year when Japanese researchers found it to be a superconductor–a material in which electric current flows resistancefree (SN: 3/3/01, p. 134: Run-of-the-mill compound becomes superstar). Most remarkable–and inexplicable–was how warm the compound, magnesium diboride, could get before its superconductivity disappeared.

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