Falsification has happened plenty of times in historical and archaeological research. You could posit that Mohenjo Daro and Ur had no contact right up until tra

Falsification has happened plenty of times in historical and archaeological research. You could posit that Mohenjo Daro and Ur had no contact right up until trade goods showed up. In recent memory just about everyone was dead certain that monumental architecture happened only where there was agriculture. And, that once a people took up agriculture, they kept at it. And, that humans got to the Americas no more than 15,000 years ago.