If accepted, the theory that this civilization could be twice as old as the Harappan, Sumerian, and Egyptian civilizations ...

Flooding meant that crops weren't growing as well. Cities began to struggle. In the end, Sumer was invaded by the Elamites who came from modern-day Iran. Narrator: Hello, future people of the UK.

Hello Future people of the UK! Would you like to visit me at the dawn of civilization in Ancient Sumer? Well, to do that you’ve got to travel back way back in time. Back before the Vikings ...