From National Geographic via Geology.com:
Jade Mystery Remains
September 7, 2013—Jade bi (discs), from
China, that resemble modern-day CD’s or donuts, and date to the late
Neolithic Period, Liangzhu culture (ca. 3300-2250 BC) remain a mystery.
From National Geographic via Geology.com:
September 7, 2013—Jade bi (discs), from
China, that resemble modern-day CD’s or donuts, and date to the late
Neolithic Period, Liangzhu culture (ca. 3300-2250 BC) remain a mystery.
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