چرا پرچم‌های شهر ممکن است بدترین چیزی باشد که هرگز به آن توجه نکرده‌اید

Roman Mars is obsessed with flags — and after you watch this talk, you might be, too. These ubiquitous symbols of civic pride are often designed, well, pretty terribly. But they don't have to be. In this surprising and hilarious talk about vexillology — the study of flags — Mars reveals the five basic principles of flag design and shows why he believes they can be applied to just about anything.

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and much more.