This experiment was conducted along time ago, and it could explain how life began. Follow the below link for a explanation,and the link after that for a better diagram.
http://en.wikipedia.org/wiki/Miller-Urey_experiment
http://www.chem.duke.edu/~jds/cruise_chem/Exobiology/miller.html
I think this is amazing, and a explanation for life that cannot be proven incorrect with our current knowledge. Argue againt me. Or if your feeling nice you could join my side of the argument.

nothing on earth could prove how life started although everything began on earth here....