I like design. I also like History. Thus, I found this article about The Evolution of National Flags quite interesting. For example, they start with a nice lesson on the American flag: 

“Did you know that the current US flag was designed by a high school student for a class project? (He got a B, though his teacher changed it to an A after Congress accepted it as the national flag!).”

Also seeing the changes of the Afghan flag is pretty wild. The flags really do tell a lot about that country’s history of stability and change.