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Like Oath, our partners may also show you ads that they think match your interests.Learn more about how Oath collects and uses data and how our partners collect and use data.It takes another 4,460,000,000 years for half of the remaining sample to decay into Pb206 and then another 4,460,000,000 years for half of what’s then left to decay, and so on.The time it takes for half of a sample to decay is called a “half-life.” By measuring radioactive half-lives, by measuring how much parent and daughter are present in any given specimen, and by making certain key assumptions, scientists believe they are able to accurately determine the age of a specimen. The question is what are the underlying key assumptions and how reliable are they?Select ' OK' to allow Oath and our partners to use your data, or ' Manage options' to review our partners and your choices.
" Answer: Radiometric dating does not fit with the “young earth” view.While the second and third assumptions have always been a bit troublesome, especially the third assumption, which considers the original constitution of a particular specimen, the first assumption was thought to be a pretty safe bet since scientists were not able to vary the decay rates much in a lab. Carl Wieland explains, “When uranium decays to lead, a by-product of this process is the formation of helium, a very light, inert gas which readily escapes from rock.Recently, however, new research has revealed that the decay rates may have been drastically different in the unobservable past. Certain crystals called zircons, obtained from drilling into very deep granites, contain uranium which has partly decayed into lead.There still remains a lot of research to do, but, as it currently stands, the accuracy of radiometric dating remains ambiguously suspect at best.Related Topics: Is carbon dating a reliable method for determining the age of things?