The Borders of Countries

The video explores Earth's continents, focusing on how land and water are divided. It discusses historical land division by rulers and the evolution of North America's boundaries. The video explains how natural features like rivers and mountains often define borders, using examples from Europe. It highlights the unique status of Antarctica and Australia and encourages viewers to explore maps to understand borders better.

Explain the significance of the 49th parallel in the context of U.S.-Canada relations.

What is unique about the border between the United States and Mexico?