How do scientists use radiometric dating
Dating schemes based on rates of radioactivity have been refined and scrutinized for several decades.
The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.
For each dating or chronological method there is a link in the box at right to take you to that section of this page.
There, you will find a brief description of the method, plus links to take you to other webpages with more extensive information.
The carbon-14 it contains, though, continues to age of the creature by testing and analyzing its ancient, fossilized bones.
Since the half-life of carbon-14 is about 5,700 years, carbon-14 can only be used reliably to date objects up to around 60,000 years old.
When an animal dies, it stops taking in new carbon.
Radiometric dating is self-checking, because the data (after certain preliminary calculations are made) are fitted to a straight line (an "isochron") by means of standard linear regression methods of statistics.