Changes

The time it takes for half of the original sample of a radioactive isotope to decay.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> Secular scientists and Old Earth Creationists believe that half-lives are constant over time while [[Young-Earth Creationists]] believe that half-lives are not constant because radiometric dating using half-life measurements indicate an Earth and Universe that are billions of years old.

The time it takes for half of the original sample of a radioactive isotope to decay.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> Secular scientists and Old Earth Creationists believe that half-lives are constant over time while [[Young-Earth Creationists]] believe that half-lives are not constant because radiometric dating using half-life measurements indicate an Earth and Universe that are billions of years old.  However, there is no empirical evidence supporting this argument.