Radiocarbon dating is used to measure the age of fossils

The carbon-14 atoms combine with oxygen to form carbon dioxide, which plants absorb naturally and incorporate into plant fibers by photosynthesis.

Animals and people take in carbon-14 by eating the plants.

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Cosmic rays enter the earth's atmosphere in large numbers every day and when one collides with an atom in the atmosphere, it can create a secondary cosmic ray in the form of an energetic neutron.Lucy was found in Ethiopia and dated to 3.2 million years ago.At the 2 million year mark, the crucial transition point when Australopithecus became Homo, few fossil remains existed. sediba individuals found at the Malapa cave site some 60 km northwest of Johannesburg met their demise at almost precisely this time.Radiocarbon dating is a method of estimating the age of organic material.It was developed right after World War II by Willard F.

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