Final answer:
During the Ice Age, glaciers covered much of North America, shaping the landscape. The Panama Canal, constructed with the involvement of the United States, connects the Atlantic and Pacific Oceans.
Step-by-step explanation:
The glaciers that swept over North America were part of a geological phenomenon known as the Ice Age. During this period, massive sheets of ice covered much of the continent. These glaciers formed as a result of cold temperatures and accumulated snowfall. As they moved across the land, they shaped the landscape, carving out valleys, lakes, and fjords. The retreat of the glaciers also left behind various landforms such as moraines and drumlins.
The Panama Canal has a rich history and has greatly impacted global trade and transportation. The canal connects the Atlantic Ocean to the Pacific Ocean, allowing ships to bypass the lengthy journey around South America. The construction of the Panama Canal began in 1904 and was completed in 1914. The United States played a significant role in the building of the canal, as it was initially controlled by the U.S. until it was handed over to Panama in 1999.