In May 1804, the first American expedition the western portion of United States called the Lewis and Clark Expedition started in a city of U.S. state of Missouri called St. Louis. The expedition is also known the Corps of Discovery.
Humans have once settled in areas that are now covered in glaciers.
The Pangaea Earthquake.
The Green House Effect.
I'm NOT 100% sure about this answer but I think it's the Lines of Longitude
A mountain is a single standing one such a Mount Fuji. A mountain range is a chain of mountains such as the Himalayas
