(photo from my "Drawing the United States" post)
Here's what I found online: Most Americans are familiar with the map of United States , but do we know why our states look the way they do? Every shape on the map tells a great story about our past. Why is California bent and why does Oklahoma have a panhandle? This documentary shows how borders were determined because of the shifting boundaries of slavery, and unexpected events such as earthquakes. The program blends geography and history, showing how state borders have been affected by politics and the natural world. Why is California bent? To cling on to gold. Why does Oklahoma have a panhandle? Because of shifting borders for slavery. Why does Missouri have a boot? Because of a massive earthquake.