i think we all have our very own world and everything that you interact with is just becomes part of it. The way you see and interact with objects just depends on a persons 'world'.

i dont believe this planet and its contents can be called fixed since there is no way to check what is the 'true' form. We came with a bunch of senses to manage in this world like eyesight, touch, etc... But other creatures dont have the same kind of sences. Cats see red and blue during day and black and white during night for example. for all we know these are the true collors of this world. we never know so i'll stick with my 'everyone has its own world' theory.