How scientists traced a uranium cube to Nazi Germany’s nuclear reactor program
A radioactive relic from World War II wound up in the hands of physicist Timothy Koeth
![uranium cube](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/05/042419_ec_uraniumcube_feat.jpg?fit=860%2C460&ssl=1)
RARE FIND This cube of uranium once was part of an attempt to build a nuclear reactor in Nazi Germany, researchers report.
John T. Consoli/Univ. of Maryland