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asteroid bennu

ROUGH TERRAIN  The boulder-strewn asteroid Bennu, shown here in a mosaic of images taken by the OSIRIS-REx spacecraft on December 2, is full of water-rich minerals.

gecko on water

ON THE MOVE  This composite image tracks the gait of a gecko as it crosses a tank of water, staying at the surface by slapping the water with its feet and getting some extra help from surface tension.

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CARBON CAP  Globally, people emitted more carbon dioxide from fossil fuels in 2018 than  ever before.

metamaterial unit cells

MAGNETICALLY MALLEABLE  A new magnetically tunable metamaterial contains many “unit cells” (like these pictured above) composed of plastic tubes filled with tiny bits of iron and oil. 



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