No matter the style, the music world has long been bookended by rising young artists and seasoned veterans alike, wannabes and legends, chart-toppers ... members range in age from 16 to 20 ...

Numerical ages estimate the date of a geological event and can sometimes reveal quite precisely when a fossil species existed in time. Third, magnetism in rocks can be used to estimate the age of ...

Numerical ages estimate the date of a geological event and can sometimes reveal quite precisely when a fossil species existed in time. Third, magnetism in rocks can be used to estimate the age of ...