For example, the population of Cahokia, the largest known city in prehistoric North America, peaked around 1100 and then ...

The U.S. population is spread out among 3.8 million square miles across 50 states, yet nearly one-third of Americans live in just three states: California, Texas and New York. New York City alone ...

Bob Kelly, professor emeritus of archaeology at UW, excavates a site in Wyoming. Kelly led a new study showing that, if Europeans had arrived in North America a few hundred years earlier, they would ...