I'm open minded but in terms of evolution, 3000 years is a very short time, so changes in human physical capabilities requires specific and compelling evidence.

I'm open minded but in terms of evolution, 3000 years is a very short time, so changes in human physical capabilities requires specific and compelling evidence. In contrast, bronze age mirrors certainly existed and noticing and leveraging the effects of non-flat surfaces seems fairly inevitable to me given you only need to look at a spoon or something.