Most people misunderstand one or more of the following. These are just a few of the many things that had to be just right for life to be.
Intelligent life is a different subject all to itself.
Of course this is all based on evolution, which I am not against or for. God created everything. If He used a form of evolution to do some of the work that is fine for me, but to think that out of total chaos a big bang happened and out of that all the right conditions formed in the right way and right place to bring us here is ludicrous. First of all, for order to come from chaos is in itself a miracle. Think about weather.