I wouldn't be so flippant sir. There is a growing body of concurrent evidence on this one. More important, it is evidence derived from totally unrelated disciplines: soil science, traditional archaeology, genetic anthropology, lexicography, botany, epidemiology...
With all these distinct disciplines pointing in the same direction, why is the resistance so shrill? (There is a reason.)
Agriculture in the Old World is a relatively recent invention, sometime around 8000 B.C.
There is very little evidence of human habitation of the Americas before 12,000 B.C.
The Ice Sheets retreated enough to allow crossing of the Bering Straits only shortly before that.
Megafauna still existed around 11,000 B.C.
While all of these assertions are constantly being revised I believe they are still considered valid. If you think otherwise, point me to the evidence.