Refining carbon dating brings into focus specific date windows for ancient events. 
Radiocarbon dating, invented in the late 1940s and improved ever since to provide more precise measurements, is the standard method for determining the dates of artifacts in archaeology and other disciplines. But this method isn’t perfect , some fine-tuning is needed.
"If it’s organic and old – up to 50,000 years – you date it by radiocarbon,” said Sturt Manning, the Goldwin Smith Professor of Classical Archaeology in the College of Arts and Sciences.
Read more on Ancient-Origins:
https://www.ancient-origins.net/news-history-archaeology/radiocarbon-dating-0013448
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