Radiocarbon dating wikipedia
The theory behind radiocarbon dating is as follows: Why doesn't the carbon-14 in the air decay along with terrestrial carbon? The trick is that radioactive carbon-14 is continually replenished in a complex reaction that involves high-energy cosmic rays striking the upper atmosphere.It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.Carbon dating measures the radioisotope concentration of Carbon 14 in an organic material.It can theoretically be used to date anything that was alive any time during the last 60,000 years or so, including charcoal from ancient fires, wood used in construction or tools, cloth, bones, seeds, and leather.It cannot be applied to inorganic material such as stone tools or ceramic pottery.
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How do scientists know how old an object or human remains are?