Yes it has happened. There is proof that there is Intelligent Design. Don't worry the mythological faither god didn't do it. http://fold.it/ this is a site supported by University of Washington They have created a game to fold Amino Acids. The process is you get an Amino Acid then you help figure out how to fold it up as compact as possible. This is the beginning process of creating life. Oh the intelligence is human nothing supernatural.
There is a LOT of research in this area. Another cool TED conference. http://www.ted.com/talks/lee_cronin_making_matter_come_alive.html
I love Science. The curiosity of the human mind is a very powerful and wonderful tool.
Even gods have to start somewhere. The old question if god created everything who created god.... Ummm Humans.