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Detailed explanation-1: -This method is called radiometric dating, and it involves the decay, or breakdown, of radioactive elements. Using radiometric dating techniques, it became possible to determine the actual age of a sample. Radiometric dating requires an understanding of isotopes.

Detailed explanation-2: -Scientists called geochronologists are experts in dating rocks and fossils, and can often date fossils younger than around 50, 000 years old using radiocarbon dating. This method has been used to provide dates for all kinds of interesting material like cave rock art and fossilized poop.

Detailed explanation-3: -To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

Detailed explanation-4: -Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.

Detailed explanation-5: -Absolute Age Dating (or, Numerical Dating) Radiometric dating works because radioactive elements decay at a known rate. They act like ticking clocks, and let geologists measure how much time has passed since those elements were sealed into a particular mineral in a rock (learn more here).