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.

A panel of experts has picked seven finalists for the name of asteroid (164207) 2004 GU9, a "quasi-moon" of Earth. You can vote for your favorite through Jan. 1, 2025.