In the end, Sumer was invaded by the Elamites who came from modern-day Iran. Narrator: Hello, future people of the UK. Would you like to visit me at the dawn of civilisation in ancient Sumer?
While the drive-thru window might seem like a pretty modern culinary invention, its roots may actually reach back much, much further than you'd expect.
The Sumerians lived about 6,000 years ago in ... and for relying less on constant summer air conditioning. These ancient civilizations can teach us how.