Matter & Energy

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cloud chamber

CLOUD MACHINE  Researchers created climate-cooling, cloud-seeding aerosols inside a cloud chamber without the sulfuric acid spewed by fossil fuel burning.

illustration of a clock and earth

YOUNG AT HEART  A clock placed at the Earth’s center would run slower than one on your nightstand. That means Earth’s core is 2.5 years younger than its surface, new calculations suggest.

CLOUD COVER  Shrinking the ice particles in cirrus clouds by blasting them with a laser could provide a method for tweaking the planet’s temperature. Scientists tested this technique in the lab, producing laser-induced explosions in ice particles.

Matter & Energy

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