10,000 BC question

[OSUFan]

Exactly when was concrete invented? It looks like they have concrete structures in the movie 10,000 BC. I had no idea Quikcrete had been in business for so long.

[T. J.]

Exactly when was concrete invented? It looks like they have concrete structures in the movie 10,000 BC. I had no idea Quikcrete had been in business for so long.

C'mon, you know it's fiction. The earth is only 6000 years old. Mike Huckabee told me so.