[ElkGroveDan]

Using radiocarbon dating, scientists found that the Ushki site, the remains of a community of hunters clustered around Ushki Lake in northeastern Russia, appears to be only about 13,000 years old, 4,000 years younger than originally thought.

OK so THIS site isn't old enough. Nothing in this discovery says they DIDN'T cross there 4,000 years earlier. All it shows is that this site is irrelevant to the debate.

[NukeMan]

Yes, the newspaper title is a bit hyperbolic; I guess it's only natural to want to pump up the importance of the find. Presumably there may exist other undiscovered jumping-off points further away. I don't know how large the Ushki Lake site is - what is the boundary of land considered 'only' 13k years old and thus too young to support migration from that area?.