Tech
Magnetic fields melt and re-form new shape-shifting devices
Miniature machines made of gallium and magnetic particles can switch from solid to liquid and back.
HS-PS2-5
Plan and conduct an investigation to provide evidence that an electric current can produce a magnetic field and that a changing magnetic field can produce an electric current.
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EarthScientists Say: Pole
A pole is either of two opposite ends of a molecule, magnet, battery, planet or other object.
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PhysicsScientists Say: Force
When an object experiences a force, its change in motion — or acceleration — depends on its mass.
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PhysicsStaying grounded in space requires artificial gravity
On TV, people in space walk around like they’re on Earth. How can science give real astronauts artificial gravity? Spin right round, baby.
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Science & SocietyBatteries not included: This Game Boy look-alike doesn’t need them
Game Boy revolutionized the gaming industry. A newer version could help slow the rate of climate change.
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ChemistryBatteries should not burst into flames
Because lithium-ion batteries power modern life, they need to store a lot of energy. Now scientists are focusing on making them safer.
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ClimateHotspots found for lightning’s superbolts
A nine-year survey reveals where and when the most energetic lightning strikes — and it’s not what scientists expected.
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PhysicsExplainer: How batteries and capacitors differ
Both batteries and capacitors can power electronic devices. Each, however, has different properties which may provide benefits — or limitations.
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ClimateThis planet’s lightning storms are like nothing on Earth
Radio waves from a faraway exoplanet could signal intense lightning storms there.
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AnimalsThe shocking electric eel!
Electric eels are fascinating animals. Their powerful zaps can act like a radar system, trick fish into revealing their location and then freeze their prey’s movements.