Freeway archaeology

Steve Kalasz looked at a pile of rocks near a shrub and saw history.
"It's right underneath the surface," he said. "People were here 1,000 years ago."

The frizzy-haired archaeologist stood on a windswept hilltop not far from Interstate 25 and pointed east and then west to the other side of the freeway.

He said that the archaeological site being excavated was likely a regular camp for American Indians who hunted bison and gathered seeds - a highly mobile group.