Physics
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We summarize the week's scientific breakthroughs every Thursday.
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		PhysicsA well-spun egg also jumps
Physicists have demonstrated that spinning a hard-boiled egg horizontally makes it jump into the air.
By Peter Weiss - 			
			
		Materials ScienceFeeling cagey
Researchers have discovered that gold can take the shape of nanoscale, hollow cages.
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		PhysicsConfined gas rejects compromise
Pairs of tiny gas clouds of unequal energies mixing inside narrow tubes retain their original energy differences.
By Peter Weiss - 			
			
		PhysicsUniverse in Flux: Constant of nature might have changed
Researchers have found signs that one of the constants of nature has undergone a subtle shift since the universe's infancy.
By Peter Weiss - 			
			
		PhysicsAbuzz about uranium
A type of atomic vibration never before seen in ordinary solid materials has been observed in uranium.
By Peter Weiss - 			
			
		Materials ScienceMicrobe holds fast
A common aquatic microbe makes a sticky substance that produces the strongest biological adhesion ever discovered.
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		Materials ScienceWired Viruses: New electrodes could make better batteries
With the aid of a bacteria-infecting virus, researchers have engineered cobalt oxide-and-gold nanowires that can be used as electrodes for lithium-ion batteries.
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		PhysicsRevealing Covert Actions
The recent merger of high-speed video technology and centuries-old techniques for seeing ordinarily invisible fluctuations of the air is enabling engineers to visualize and study the previously unseen, large-scale behavior of shock waves in explosions and aerodynamics research.
By Peter Weiss - 			
			
		Materials ScienceSpin City
Researchers are using a technique called electrospinning to create fibrous mats that have potential applications in drug delivery, wound care, and tissue engineering.
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		PhysicsTiny wires trigger electric reversal
Ultrathin zinc nanowires exhibit a puzzling conductivity reversal that flies in the face of known wire behavior.
By Peter Weiss - 			
			
		PhysicsTipsy Superfluids: Glimpsing off-kilter quantum clouds
A new type of superfluid atom cloud that's been thrown off-balance by having more atoms with their quantum spins pointing up than down, or vice versa, seems to defy theoretical expectations.
By Peter Weiss - 			
			
		Materials ScienceMaking the Most of It
A recent crop of studies demonstrates how nature finds strength in unlikely places.