What is without question is that Alaska was the gateway to the Americas. There may have been other avenues of settlement, but the majority of evidence supports a stream of migrations from Asia to Alaska that then spread throughout North and South America. So when did people first make this journey? Pick a date between 30,000 and 15,000 years ago, and there is apt to be an argument to support it. There is little agreement on dates, and some theories suggest that these migrations occurred in several phases, perhaps thousands of years apart.
