Reading zip codes of 3,500-year-old letters: Non-destructive X-ray scanning of archaeological finds

A researcher in Israel uses a hand-held device based on x-ray fluorescence, a device that can be found in many chemistry labs, to non-destructively ascertain the chemical composition of ancient tablets. Using an index that he's developed, he can determine the geographical origin of coins, ancient plasters, glass and tablets to investigate the secrets of ancient history.

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