Scientists calculate ages by measuring how much of the isotope remains in the substance.
Continue Reading The key to an age of a substance is the decay-product ratio.
With the release of key peer-reviewed papers at the 2003 ICC (International Conference on Creationism), it is clear that RATE has made some fantastic progress, with real breakthroughs in this area.
When physicist Dr Russell Humphreys was still at Sandia National Laboratories (he now works full-time for ICR), he and Dr John Baumgardner (still with Los Alamos National Laboratory) were both convinced that they knew the direction in which to look for a definitive answer to the puzzle of why radiometric dating consistently gives ages of millions and billions of years.
RADIOMETRIC DATING WORKS Geology observations about the relation between different rocks can give relative ages, but radiometric dating is the primary method for giving absolute ages. During a certain length of time called a half-life, half of the radioactive parent atoms in a sample decay to stable daughter atoms.