The Giant-impact hypothesis suggests that, The Earth Moon is formed from the ejects of a collision between the proto-Earth and a Mars-sized planet…etc I suggest the following theory: -Mars itself had collided The Earth and not another planet. how that is happened? -Mars original orbital distance =84 mkm, and Mars had to move from it to its new orbital distance =227.9 mkm – i.e. - Mars had to move from 84 mk to 227.9 mk. -Through Mars motion – Mars had collided Venus (at first) and Earth (at Second) -Mars had moved pushing by a strong force from 84 mkm to 227.9 mkm and that caused the collisions debris (and ejects) to move with Mars in the same motion – -Venus has no Moon –because the debris had to move with Mars in the same motion, But because Earth Mass is greater than Venus & Mars and because the debris lost their high motion momentum, Earth could controlled some of these debris and created its moon by them – the rest debris still moved with Mars -Mars could attract its 2 small moons from these debris How to prove this story? By 3 following questions: (1st question) Was Mars Original Orbital Distance = 84 mkm really? how to prove? (2nd question) Is Mars Motion from (84 mkm) to (227.9 mkm) an unique motion? (3rd question) What are the results which prove this motion occurrence? These questions will be discussed– but let's summarize the (3rd question) Answer: Mars Immigration Results: 1- Mars Diameter Decreasing 2- The Asteroid Belt Creation. Gerges Francis Tawdrous +201022532292