Yes, this is a theory which is believed by many people in the modern world today, it is believed that people from Russia and Siberia crossed the Baring Strait when it was frozen over 20 000 - 40000 years ago and spread out across North America, and when settlers came they became know as Native Americans. However Native American's refute this theory and state they have lived on the land since the beginning of time itself.
Industrial development
The expedition's goal as stated by President Jefferson was "to explore the Missouri River, & such principal stream of it as, by its course & communication with the water of the Pacific ocean may offer the most direct & practicable water communication across this continent, for the purposes of commerce." In addition, the expedition was to learn more about the Northwest's natural resources, inhabitants, and possibilities for settlement.
The word transcontinental means to extend across a continent.
6000
Asia
Asia to the North American Continent
The earliest inhabitants of the Americas were thought to have come across a land bridge from Asia, based on anthropology as well as genetic evidence.
the earliest inhabitants of the Americas were thought to have come across a land bridge from Asia, based on anthropology as well as genetic evidence.
Asia
Continental Drift
The earliest inhabitants of North America were Native Americans. They came from East Asia and crossed the land-bridge connecting Asia and North America during the Ice Age.
The first inhabitants of the United States and Canada were Indigenous peoples who migrated to the region thousands of years ago. They had diverse cultures, languages, and ways of life, living in tribes or nations across the continent before European colonization began.
The US tapers from about 3200 miles across in the north to about 2500 miles across in the south.
America's earliest inhabitants came from Asia. Sea levels were lower 12,000 years ago and there was a land bridge where the Bering Straits now are. They basically walked across.
The temperature of the continental crust varies widely across different areas and at different depths.
coninental trenches are trenches that go across countries...i think