Comprehensive foreign media reports according to the official website of the official website of the St. Barbara School of the University of California，Recent research on Lynn Gamble, a professor of anthropology at the school, shows，North America ancestors living today in California may use shells as currencies before 2000，This is about 1200 years earlier than previous scholars。

Previous archeologists Bet365 lotto review thought，Ancient Aboriginal Qi Mash people living in California, the history of the use of shell beads as currency can be traced back to 800 years ago。but but，Research on the shell beads called discs -shaped beads unearthed from the San Francisco Bay Area，Make a challenge to this conclusion。Gan Bo said，These early disc -shaped beads have a standardized shape like a bead that appeared 1000 years later。A survey of different shell beads、Measurement and standardization comparison，You can clearly see，These beads may be coins，And bet365 Play online games it appears much earlier than before。

There are already a lot of evidence to indicate today，The early shell beads represented by the above plate beads are produced in the northern Strait Islands，The evidence includes tools for making shell beads such as drilling，and a large number of shell fragments scattered on the surface of the archeological site on the island。Comprehensive information，Ganbo thinks，Indians in California when they first contact Europeans at the beginning，Trading many types of products for transactions，The use of shell beads bet365 best casino games has undoubtedly greatly promoted the formation of this widespread exchange network。

Gan Bo's research not only re -defines the origin of the American currency，Also refreshed the old concept。Because the Churus is a non -agricultural group of non -agricultural people who live in hunting，For a long time，People think they do not need currency。The significance of this research lies in，It challenges a long -term view of some economists and archaeologists，The so -called "primitive" society cannot have a commodity economy。

(Yan Yong/Compilation)