How did the American Indians found their way to the continent of America? And why did they migrated?

Question

thanks!

Answer 1

The common theory is that, during the later stages of the Ice Age, they crossed a land bridge between Siberia and Alaska and then fanned out into the unpopulated land.  This seems supported by the bulk of the data about when people first showed up in different parts of the American continent.  However, there are some other theories, and more than one route may have been used.  Given the weather in Siberia and Alaska, which is not super even now, why they could have crossed back then or even wanted to is open to question.

Answer 2

It was much colder then.  During the Ice Age, there was much more exposed land mass in the world, because so much of the sea was frozen.  The first people in America came from Siberia/Asia from the west and Europe from the east, as they either walked over the ice or paddled canoes over the sea bed keeping near to the edge of the ice.  Some speculates that people may have hopped islands from Southeastern Asia to Pacific islands and then to South America.  

Why?  In Siberia, many scientists believe that Lake Baikal was a warm oasis in the middle of cold environment.  When the Ice Age began to recede and the weather became warmer, people began to venture away from Lake Baikal, some going southeast to Korea, some going northeast towards Alaska, because Asia and North America was connected by ice.  

Similar in Europe.  It was cold and dangerous to live in northern Europe and people found that the sea provided abundant food and relative safety from predators.  They too traveled along the edge of the ice to cross the Atlantic to find Newfoundland.

In the Americas, the animals did not recognize the first human beings as dangerous having never encountered them before, so the game was easy to hunt and abundant.  It was heaven for these hunters/gatherers.

Answer 3

When the Bering sea was frozen over at the end of the last iceage. They were following game animals.  that is the current textbook explanation and I think this only applies to the 1st culture of North America not SouthAmerica.