In Atlantis: The Lost Empire, Kida is revealed to be a hundred years old.
The cataclysm happened when Kida was a small child, so nearly a hundred years ago. However, when arguing with her father about restoring the crystal, she claims that their people do not know any better than their current life.
This implies that those who were there 100 years ago have already died, except for Kida and her father.
Why do they live longer? Royalty? Everyone in Atlantis uses the crystals, so are the crystals giving them a special treatment for their nobility?
Or, is it another possibility, that they have forgotten about the glory years of Atlantis? If so, why?
Or, can this be just a plot hole?