In last week's issue of the journal Science, Andrew Lawler gives a lengthy report on the forgotten city of Cahokia. For a while now archaeologists have known about this Native American settlement beneath modern East St. Louis, but many believed it was what Lawler calls a "seasonal encampment." A new round of archaeological digs, done in preparation for a bridge being constructed across the Mississippi River between Missouri and Illinois, has unearthed evidence of "a sophisticated, sprawling metropolis stretching across 13 kilometers on both sides of the Mississippi" that existed about a thousand years ago, Lawler writes.
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