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Halley's Comet begins its 38-year journey back toward Earth tonight

AI chemist finds molecule to make oxygen on Mars after sifting through millions

Supermassive black holes may solve mystery of universe's gravitational-wave 'hum

Humans are pumping out so much groundwater that it's changing Earth's tilt

Every planet in the solar system will be visible on Wednesday (Dec 28 2022)

In a First, an 'Atomic Fountain' Has Measured the Curvature of Spacetime

China's Lunar Rover Has Found Something Weird on the Far Side of the Moon