Nazi Germany had no hope of making an atomic bomb, uranium cubes reveal · RICHARD STONE
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Experimental reactor needed much more uranium and heavy water than the country could muster RICHARD STONE One morning in August 2013, Timothy Koeth was out for a jog on the University of Maryland (UMD) campus in College Park when the university’s radiation safety officer called and asked to see him urgently. The materials scientist, “all sweaty and out of breath,” he recalls, met the officer in a parking lot, where she opened her car’s trunk and produced a lunch bag. Inside, nestled in paper towels, was a gray cube, 5 centimeters wide and startlingly dense. “She says, ‘Do you know what this is?’ …
摘自《科学》(Science)2026年10月8日,RICHARD STONE。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。