North America was reached by its first human populations during the last glacial period, via crossing the Bering land bridge approximately 40,000 to 17,000 years ago. The so-called Paleo-Indian period is taken to have lasted until about 10,000 years ago (the beginning of the Archaic or Meso-Indian period). The classic stage spans roughly the 6th to 13th centuries. The pre-Columbian era ended in 1492, with the beginning of the transatlantic migrations of European settlers during the Age of Discovery and the early modern period. However, the first recorded European references to North America (other than Greenland) are around 1000 AD in Norse sagas where it is referred to as Vinland. Present-day cultural and ethnic patterns reflect interactions between European colonists, indigenous peoples, African slaves, immigrants, and the descendants of these groups.
North america map outline, B is for Butterfly – Learning the alphabet is critical for young children to learn to read, and there are also coloring pages available to help them.