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Materials

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hydrogel disks

IT’S ELECTRIC  A new type of energy source made with hydrogel disks (shown) works a lot like the power-producing organs inside electric eels.

illustration of a superconductor

VORTEX FOUND  Newly observed swirls of electric current in a high-temperature superconductor (shown in an artist’s conception) may indicate that the unusual material fits within the standard theoretical picture.

soap bubble

THIN ICE  A patchwork of ice crystals swirls across the surface of a soap bubble as it freezes. The glittery display is caused by a mismatch in surface tension in different regions of the soapy film.

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