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Molten metal in motion Nanoscale inclusions of lead in aluminum don't melt until they're over 100 degrees hotter than the melting temperature of lead in bulk. Then watch out! The tiny blobs of liquid careen through solid aluminum just the way Einstein described in his classic 1905 paper on Brownian motion. In close-up:
a cell's skeleton Flexible, versatile structures made from tubulin proteins, called microtubules, form the skeleton of the cell. The most detailed image of a microtubule yet, at 8-angstrom resolution, shows the tube-shaped weave of protein that cells use to maintain their shape, transport materials, and divide. Getting it wrong |
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