"If all we're doing is making the 17th version of a movie you've already seen, our culture isn't going to look very good," he said.

Archaeological evidence shows their culture goes back at least 2500 years.

There's no end to the ways a culture can go.

One culture had gone so far as to cover half of their planet with a giant city, and then developed an artificial brain for it.

Archaeologists think their culture goes back at least 2500 years.

We try to join forces in so many areas; why should culture go it alone?

But the culture isn't going to be easy to crack.

"We've got to keep track of where these cultures are going."

The culture started here and went around the world.