Thứ Năm, 3 tháng 9, 2020

Gravity, Gizmos, and a Grand Concept of Interstellar Journey

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For decades, Jim Woodward dreamed of a propellantless engine to take humans to the stars. Now he thinks he’s got it. But is it revolutionary—or illusory? It was a warm afternoon in July, and Hal Fearn was sitting in his camouflage jeep in the parking lot of a mostly empty IHOP in Southern California. Fearn, …

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