It is not that the hypothesis is unlikely [0], it is the formation of the moon that is very unlikely. When you try to simulate a collision between the Earth and

It is not that the hypothesis is unlikely [0], it is the formation of the moon that is very unlikely. When you try to simulate a collision between the Earth and Mars-sized planet it is very unlikely to create the Moon. 0. https://en.m.wikipedia.org/wiki/Origin_of_the_Moon https://en.m.wikipedia.org/wiki/Origin_of_the_Moon