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5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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ScienceShot: Shaving a Diamond
29 November 2010 1:49 pm
How do you cut the hardest thing on Earth? Jewelers know it can be done; they've been cutting diamonds for centuries with other diamonds. Materials scientists just didn't know why this worked. Now they do, thanks to a new computer simulation of two diamonds rubbing against each other under high pressure. According to the model, published online yesterday in Nature Materials, carbon atoms on one diamond (left arrow) latch onto carbon atoms poking out from the other diamond (curved arrow) and briefly pull them along, breaking and reforming atomic bonds as they go. This creates an amorphous surface with liquid-like properties, which allows the diamond to be cut. The findings could lead to a new generation of amorphous diamond coatings on objects such as car pistons, which could rub against each other at high speeds without wearing down and with minimal lubrication.
See more ScienceShots.