With the rivers drying out as a result, the civilisation collapsed some 4000 years ago.

"As we make it, civilization collapsed here less than five hundred years before this picture," Brad said.

Their civilization collapsed near the end of the 8th century for unknown reasons.

Even after civilisation has collapsed they will still come to the mall.

A whole civilization collapsed back into the stone age in about ten years.

The civilizations on Earth have collapsed and turned into a barbaric society.

Let us ignore the obvious fact that our entire civilization would collapse, because the robots are the ones who run it.

Or perhaps that civilization has already collapsed, leaving these relics as evidence of its decline.

One major colony ship was sent there before civilization collapsed on Earth, and the colonists were given up for as lost.

Experts are still uncertain why their civilization suddenly collapsed around 900.