I have an interest in the universe and am constantly reading up on it or watching programs related to it. Last night saw a program that spoke of how the earth was possibly/more than likely created: a star went supernova, and dust particles (unlike lint from the washing) started sticking together, first small dust particles, then bigger, forming rocks and so on and so forth. Over billions of years we have a planet - nothing like what we see now though.
Over a few more billions years an outter crust is formed, though there are volcanos, which continually spew horrid gases into the year.
Where did the water come from - consider we have 2 types of water: H2O and the denser HdO. Scientists say it could have come from iced comets that bombarded the earth - they would have to be huge ass comets though to give us that amount of water. When looking at the structure of the water from comets - they are similar to earths but not the same.
Then life - where did the seed of life come from if there is no creater. Comets could have carried single celled bacteria (how did they get on the comet in the first place and where did they in turn come from) to earth - there are millions of these extremely primitave life forms that can survive in the most extreme conditions. Now a collective of these single cells happend to find their way to the ocean and started the process of photosynthesis and release massive amounts of oxygen, they grew faster and more developed and started morphing into more complex life. Finally getting to the human being.
There is so much that would have had to have gone right in order for this to happen. SOOO much.
I'm not making an argument for a god creating everything either.