Physics
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Materials Science
Color-tunable sunglasses
Engineers have developed sunglasses that can change from dark, filtering hues to clear—and back—at the flip of a switch.
By Janet Raloff -
Materials Science
Taken for a Spin
Considering silk from the spider's perspective may offer the best chance of replicating these creatures' tough threads.
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Physics
Formula for Panic: Crowd-motion findings may prevent stampedes
The physics of pedestrian flows could help prevent stampedes such as the one that killed hundreds during a pilgrimage to Mecca in 2006.
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Physics
Closer to Vanishing: Bending light as a step toward invisibility cloaks
Invisibility cloaks may be a long shot, but new optical tricks could help in the design of future computers.
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Physics
Warming Up to Criticality: Quantum change, one bubble at a time
Physicists can now observe matter as it gradually turns into a Bose-Einstein condensate—the exotic state of matter that displays quantum behavior at macroscopic scales.
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Materials Science
The New Black: A nanoscale coating reflects almost no light
A "carpet" of microscopic filaments sprayed onto a surface can prevent it from reflecting light, a potentially useful trait for technologies from solar cells to fiber-optic communications.
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Physics
Breaking a molecule’s mirror image
The theory of entanglement explains a newly observed behavior in a symmetrical hydrogen molecule: When the molecule fractures, the directions in which its constituent particles move are not always random.
By Ben Harder -
Physics
Waves from the Big Bang: Upcoming detectors may view newborn universe
Ripples in space-time may soon give scientists a glimpse of the universe as it looked a tiny fraction of a second after its birth.
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Physics
The mystery of the missing mass
Researchers found that, for one kind of particle at least, being located inside a nucleus slightly reduces its mass.
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Materials Science
Microstructures make a beetle brilliant
Engineers looking to make a variety of surfaces whiter and brighter could learn a few things from a lowly beetle.
By Sid Perkins -
Materials Science
Savvy Skins
Researchers are developing new coatings that incorporate multiple functions, offer chemical reactivity, or act in response to stimuli in the environment.