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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
How much oil could we recover from the Arctic National Wildlife Refuge?
Does one megawatt of electricity power a thousand homes? How much power
is used by office equipment? If you depend on even respected news media
for answers to these important public policy questions, you're probably
getting the wrong
numbers.
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