Here is what I found interesting in the article...
“We know that a land bridge must have been in operation throughout much of the last 66 million years,” Eberle said. “The catch is finding fossils in the right place at the right time.”
In this case, the people at the right place and at the right time was a Yukon schoolteacher and her students.”
Wait? A passable land bridge in between glacial periods for 66 million years? Only animal species allowed but never hominids until this last one?
“Only animal species allowed but never hominids until this last one?”
I believe that there was a lot of human activity along the coastlines of the time when ocean levels were much lower than they are today. All of that is now under water.