One COULD speculate about a lost Pre-Egyptian civilization that might have built great structures before the dawn of written history. We COULD speculate they may have domesticated LOCAL mega-fauna. And we COULD tell a tale of primitive peoples --- maybe from post-Ice Age Europe --- who might discover that lost civilization.
But it just looks like the makers '10,000 BC' just went nuts trying to make agoofy Hollywood movie, rather than sticking with the basic premise.
As somebody else said, it's as if they tried to remake 'One Million Years B.C' without Raquel Welch. Not good.
