fill in the blanks We can know no about prehistory through……….
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Archaeologists can estimate the age of fossils and artifacts through several techniques. Carbon dating measures the amount of radioactive carbon in fossils to place them in time. Age can also be determined by identifying the age of the layer of rock that the artifacts are buried in.
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University Of Pennsylvania Museum
As archaeologists in the last half century have set about reconstructing the prehistory of Southeast Asia, data from one country--centrally located Laos--was conspicuously missing. Little archaeology has occurred in Laos since before World War II, and beginning in the mid-1970s, Laos shut its doors completely to outside researchers.
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