In 1902 Ernest Rutherford and Frederick Soddy discovered that radioactive elements, such as uranium and thorium, broke down into other elements in a predictable sequence or series. This amazing ...

Certain isotopes are unstable and undergo a process of radioactive decay ... Using this technique, called radiometric dating, scientists are able to "see" back in time.

Some commonly used dating methods are summarized in Table 1. The rate of decay for many radioactive isotopes has been measured and does not change over time. Thus, each radioactive isotope has ...

The estimated price for cleaning up leftover radioactive waste along Coldwater Creek in neighborhoods around Hazelwood ...

Activities include museum visits, rock collecting, and gifting gemstones. Geologists use radioactive dating to determine rocks' ages, with the oldest dated rock being 4.4 billion years old.