The technique, which measures a process called amino acid racemization, indicates that DNA can only survive for a few thousand years in fossils found in warm regions such as Egypt and for about 100,000 years in fossils discovered in high latitudes such as those in the Arctic.
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L:in high latitudes such as those in the Arctic
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that DNA can only survive for a few thousand years in fossils
T:for a few thousand years in fossils
L:in warm regions such as Egypt and for about 100,000 years in fossils