More shrimp products, some sold at Publix, recalled over radiation concerns

AquaStar Corp. issued a recall Oct. 17, stating that some shrimp products may have been exposed to "very low levels of cesium ...
Scientific American

Cesium Clock Faces Ytterbium Challenge

You’ve given some thought to oxygen, carbon, uranium. But you’ve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and ...