NPR Science: Have You Seen Any Nazi Uranium? These Researchers Want To Know.

“Timothy Koeth’s office is crammed with radioactive relics — old watches with glowing radium dials, pieces of melted glass from beneath the test of the world’s first nuclear weapon.

But there is one artifact that stands apart from the rest: a dense, charcoal-black cube, 2 inches on a side. The cube is made of pure uranium metal. It was forged more than 70 years ago by the Nazis, and it tells the little-known story of Germany’s nuclear efforts during World War II.”

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Physics Today: Tracking the journey of a uranium cube. (01 May, 2019)

“In the summer of 2013, a cube of uranium two inches on a side and weighing about five pounds found its way to us at the University of Maryland. If the sudden appearance of the unusual metal cube wasn’t intriguing enough, it came with a note that read, “Taken from the reactor that Hitler tried to build. Gift of Ninninger.“ “