In the way of creation myths, ponies focused on the founding of Equestria as the beginning of the world, even though they knew their kind had lived before, and lived in other places too. It’s like they’re willfully ignorant. Maybe Lucky was being paranoid, but it felt to her as though someone had intentionally purged the library of any information that might be useful for a search like this. Anypony who wanted to know more about the structure of their “planet” would be sorely disappointed. If the sciences were taught the same way in other parts of the country, ponies wouldn’t even get curious.