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Question
World History
Posted 7 months ago
how do they know the bones are so old?
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Answer from Sia
Posted 7 months ago
Answer
Scientists determine the age of bones through various dating methods such as radiocarbon dating and other forms of radiometric dating.
Key Concept
Dating Methods in Archaeology and Paleontology
Explanation
To determine the age of ancient bones, scientists often use radiocarbon dating, which measures the decay of carbon-14, a radioactive isotope found in all living organisms. When an organism dies, it stops absorbing carbon-14, and the isotope begins to decay at a known rate. By measuring the remaining carbon-14 in a bone, scientists can estimate when the organism died. This method is effective for dating bones up to about 50,000 years old. For older bones, other radiometric dating methods, such as potassium-argon or uranium-series dating, may be used. These methods rely on the decay of other radioactive isotopes and can date bones and rocks that are millions of years old.

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