RT: Archaeologists have discovered that the Chumash Indians were using standardized shell beads 2,000 years ago, suggesting currency usage. This pushes the origins of money in the Americas back by an extra 1,200 years. https://scitechdaily.com/an-an...
RT：考古学家发现丘马什印第安人在 2000 年前使用标准化的贝壳珠，这表明使用货币。这将美洲货币的起源又推后了 1200 年。 https://scitechdaily.com/an-一个...