5 years ago
How scientists traced a uranium cube to Nazi Germany’s nuclear reactor program
The mysterious cube arrived in the summer of 2013. Physicist Timothy Koeth had agreed to go to a parking lot for an unspecified delivery. Inside a blue cloth sack, swathed in paper towels, he found a small chunk of uranium. It was about 5 centimeters across, with “a white piece of paper wrapped around it, like a ransom note on a stone,” Koeth says. On the paper was a message: “Taken from the reactor that Hitler tried to build. Gift of Ninninger.”
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