Why is there no life on the moon?

My question is: Why is there no life on the moon?

I recently asked myself this question, and I wasn’t able to find a reasonable answer thus far, hence the fact I am asking it on fluther.

First of all, I understand that there is no life on the moon because the moon doesn’t have water or an athmosphere… (on other websites people’s answers didn’t go any further than that, but that doesn’t do it for me) I want to know, why we have life on Earth, but why it is not on the Moon? Why doesn’t the moon has an athmosphere and water like we do? We both have the same orbit around the sun, so why doesn’t the moon contain life aswell?

The conditions for life (as we know it) needs water and an athomesphere, so why is there no athmosphere on the moon and is this the reason that there is no water on the moon? Is it a possibility that the gravitational field from Earth is stronger than that of the moon so does gravitational fields have something to do with it? (maybe another factor for life to evolve on a moon or planet has to be that the planet or moon is rotating, so that the heat from the sun warms up the whole planet instead of just one part of it… hmm)

As you can see, I have a lot of questions, I might be simply looking in the wrong direction to find an answer… But I hope some of you can help me out with this.

Thanks in advance