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Radioactive iodine (RAI) therapy is a type of treatment for an overactive thyroid, hyperthyroidism, and certain types of thyroid cancer. The term "radioactive" may sound scary, but it is a safe and ...

Uranium is a naturally occurring radioactive element, which has the atomic number of 92 and corresponds to the chemical symbol U in the periodic table. It belongs to a special group of elements called ...

The U.S. has embarked on the largest and most expensive nuclear build-out ever. The U.S. military says it is necessary to replace an aging nuclear arsenal. But critics fear the risks. This article is ...

Radioactivity can show up in food in everyday, natural ways. It comes from soil, plant roots, animal biology, and even the basic chemistry that keeps cells functioning. The amounts are very small and ...