Who were the first immigrants to our country? You might think they were the Pilgrims. But scientists believe there were other groups that migrated to North America many thousands of years before the Pilgrims.
Some scientists believe the first immigrants came from Asia. They believe that people from Asia came to North America between 10,000 and 15,000 years ago. At that time there was an ice age. Sea levels were about 200 feet lower than they are today.
Scientists believe the first immigrants crossed the Bering Land Bridge from Siberia into what is now Alaska. This land bridge is now covered by the Bering Strait. Over time, the people moved southward and then spread to the east.