Mexican cactus

Ceria microstructures with sputtered Au. Scanning electron microscope image at 20 KV, X3500.

Araceli Romero Núñez, National Autonomous University of Mexico, Mexico

figure 1

April 2015 answer key

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Tethered moon

Ultrathin (50 nm) ribbons of brown recluse silk applied to a eutectic Pb/Sn solder ball on Si.

Sean R. Koebley, College of William and Mary, USA

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