Physics
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We summarize the week's scientific breakthroughs every Thursday.
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		TechA new airplane uses charged molecules, not propellers or turbines, to fly
A small aircraft prototype is powered by ionic wind flowing in one direction and pushing the plane in the other.
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		Particle PhysicsNuclear ‘knots’ could unravel the mysteries of atoms
Skyrmions might help loosen scientific snarls in studies of atomic nuclei.
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		MathIt’s official: We’re redefining the kilogram
In May 2019, the system of measurement will be upgraded to rely on fundamental constants.
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		Quantum PhysicsPhysicists wrangled electrons into a quantum fractal
The tiny, repeating structure could reveal weird behavior of electrons in fractional dimensions.
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		PhysicsBizarre metals may help unlock mysteries of how Earth’s magnetic field forms
Weyl metals could simulate the dynamo effect that generates the planet’s magnetism, a new study suggests.
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		Particle PhysicsPhysicists measured Earth’s mass using neutrinos for the first time
Counting tiny particles that can zip straight through the Earth reveals what the planet is like on the inside.
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		Materials ScienceQuestions about toxic red tides, and more reader feedback
Readers had inquiries about a new deicing material, harmful algal blooms and more.
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		PhysicsA new measurement bolsters the case for a (slightly) smaller proton
The PRad physics experiment has come up with a result favoring a punier proton.
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		PhysicsVanadium dioxide’s weird phase transition just got weirder
When shifting from one crystalline structure to another, the atoms inside vanadium dioxide bumble around a lot more than expected.
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		AstronomyThree gas clouds nearly grazed the edge of the Milky Way’s black hole
Gas clumps cozy up to the Milky Way’s enormous black hole, new observations reveal.
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		PhysicsThis cloud-zapping laser could help scientists create a quantum internet
A powerful fast-pulsing laser can bust through clouds to make quantum communication via satellite easier.
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		Particle PhysicsWhat the electron’s near-perfect roundness means for new physics
The electron remains stubbornly round, meaning we may need to build beyond the Large Hadron Collider to find physics outside of the standard model.