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- Tech
Current may flow free and cheap
Wires that carry electricity without resistance at relatively high temperatures--and are inexpensive--moved a large step closer to reality as a 100-fold speed-up in depositing a key material wiped out a major obstacle to making those wires.
- Tech
From silicon seeds, laser might sprout
The achievement of light amplification in a layer of tiny nuggets of silicon called quantum dots raises the possibility that long-desired silicon lasers are on the way.
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Brain keeps eye on performance
A brain area that controls eye movements may also participate in a broader neural system of self-regulation.
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Suicide rates revised for depression
A research review concludes that the suicide rate among people diagnosed with depression has been overstated.
