grifter, i don't understand anything that you said !!! :confused: T__T i never knew that the teacher set up a very hard challenge and for a 15 year old as well <__< but i'm doing my best here. ok, first of all, i need to find a suitable planet. it can't be too col (like pluto but then pluto is not a planet) and no high gravity, i dont want to be squashed so is mars ok since it's just next to earth and it;s not that far from earth as well. so like in mars, we could attempt to recreate our environment inside protective domes and become part of a giant closed ecosystem.