An archaeological dig in southwest Missouri that challenges some of the commonly-held theories about how people came to North America is being eroded by a creek at the rate of four feet a year. And archaeologists say there is not money to either stop the erosion or speed up the excavation to stay ahead of the damage. Discoveries of tools at the Big Eddy site go back more than 12-thousand years, indicating people were in that area well before some researchers say people crossed the Bering Sea land bridge and settled in the west.