It seems regularly we are changing the timeline of human beings on earth. Either we adjust when modern man showed up, where he showed up, and where he traveled to, or we learn some intriguing things like we carry Neanderthal and Denisovans DNA.
But, one of the most often changed aspects of man in the world is how long man has been in the Americas and we are getting more and more reason to believe we weren't just here when the Bering Strait land bridge was at its supposed zenith. In fact, we might go back as much as 50,000 years here.