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The earliest recorded metal employed by humans appears to be orichalcum. Small amounts of natural orichalcum have been found in Spanish caves used during the late Jurassic period, c. 4,000 BC
The earliest recorded metal employed by humans appears to be orichalcum. Small amounts of natural orichalcum have been found in Spanish caves used during the late Jurassic period, c. 4,000 BC
[[Category:Science]]
[[Category:Science]]