When I first began studying and performing archeology, the ‘consensus’ at the time was that humans crossed over to what is now Alaska when the continents were connected during the last Ice Age. The ‘consensus’ dictated that the first humans crossed over into what is now Alaska 10,000 years ago. Back then I immediately laughed (to myself). ‘To myself’ because to question the prevailing theory at that time would not have assisted in furthering my career. I knew instinctively that humans could have come to the New World much earlier, but back when I first began studying we just did not have the technology, or evidence, to prove it. The surface of the Earth is constantly changing, and evidence is, at times, difficult to find. Discoveries like the one in this article do not surprise me at all.
Thanks RMII, this find is really interesting, because it underlines the fact that most of the past two million years the continental shelves have been wholly or partially dry land, and most human and proto-human activity almost certainly took place there -- and that's true of the Americas as well.