Physics
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We summarize the week's scientific breakthroughs every Thursday.
- 			 Physics PhysicsLaser tractor beam tugs on beadsA new experiment is the first to construct a tractor beam that can pull objects over long distances with light. By Andrew Grant
- 			 Physics PhysicsPerfect fluid of electrons may flow inside superconductorUnderstanding superconductors’ viscosity could help inspire scientists to find ways to improve the electric power grid. By Andrew Grant
- 			 Physics PhysicsComplete double rainbow encircles Australian townA photographer in a helicopter captured a double circular rainbow while flying around a storm near Perth, Australia. 
- 			 Particle Physics Particle PhysicsNew particle could help physicists understand subatomic glueA newfound particle will allow scientists to probe the universe’s strongest force. By Andrew Grant
- 			 Physics PhysicsFalling raindrops break terminal velocityUnknown mechanism causes tiny raindrops to fall faster than terminal velocity. 
- 			 Quantum Physics Quantum PhysicsHawking radiation spotted within sonic black holeLab-created sonic black hole emits energy as famed physicist Stephen Hawking predicted, though the experiment may not be definitive. By Andrew Grant
- 			 Materials Science Materials ScienceBlue LEDs win Nobel Prize in physicsLight-emitting diodes have led to more energy-efficient bulbs that are elbowing out incandescents. By Andrew Grant
- 			 Chemistry ChemistryLasers wrest oxygen from carbon dioxideBy zapping oxygen molecules off carbon dioxide, an experiment hints that Earth may have had breathable air long before the dawn of plants. By Beth Mole
- 			 Physics PhysicsBlue light-emitting diode earns three researchers Nobel Prize in physicsThe invention of blue light-emitting diodes has been awarded the 2014 Nobel Prize in physics. 
- 			 Quantum Physics Quantum PhysicsPhotons on roundabout route could get caught in actionProposed twist on classic double-slit experiment could identify light that weaves in and out. By Andrew Grant
- 			 Health & Medicine Health & MedicineZero calories and other awe-inspiring science talesIn this issue, reporters look at artificial sweeteners, resurrecting a West Coast plant, quasiparticles and the future of our magazine and its parent non-profit, SSP. By Eva Emerson
- 			 Quantum Physics Quantum PhysicsQuasiparticles help physicists make sense of the worldTo improve semiconductors, superconductors and other materials, physicists view a particle and its surroundings as one entity. By Andrew Grant