An evening with the Cerutti Mastodon Scientists
"Asking questions is at the heart of scientific discovery. Science is always seeking the best explanation that fits the evidence when new information is uncovered, no matter what we thought was true before." Don't forget, the bison or buffalo emigrated from Siberia to North America around 195,000 to 135,000 years ago. Why should the early human beings not have followed their food source from Siberia to North America at that time, too?
"A site in Siberia has evidence of human presence 417,000 years ago, raising the possibility that hominins could have reached North America much earlier than we thought." (in: NewScientist 19. April 2024)
By the way, the connection between Siberia and Alaska, the Bering Land Bridge, existed for perhaps 80% of the last million years.