Does God exist

Since this is only the opening argument I can't really discuss Pro's argument yet. However, I will argue that the origin of the universe, the origin of life, and the origin of humans can all be explained without god. I am going to be a little lazy here and just copy my argument for these in a previous debate that I had. Remember, this isn't plagiarizing. It is my own work.The Origin of the UniverseThe big bang serves as our best explanation. There are many variations of the big bang so I will describe the one I tend to agree with the most. The universe is in a cycle of expanding and then contracting, over and over again. What started this cycle? Scientists don't really know. However, we don't know how "nothing" behaves. We are going to assume that before the universe came into existence, there was nothing. What is nothing? Nothing is absence of space, matter, energy, time, and the laws of physics. Have we ever seen how nothing behaves at all? No. Who knows what it is capable of? Okay, this may seem far fetched when I say it. Look at this quote from Stephen Hawking. "Rather, the universe, and time itself, had a beginning in the Big Bang, about 15 billion years ago. The beginning of real time, would have been a singularity, at which the laws of physics would have broken down." No laws of physics could mean random generation of matter, space, energy, time, and laws of physics. What are the odds that all the laws of physics were exactly right for sustaining life? Incredibly small. Just one constant, gravity, had to be extremely precise to allow our galaxy to be what it is. If the gravitational constant was slightly greater, we would have almost nothing but black holes. If it was slightly smaller, everything would be too far spread out leading to the heat death of the universe. Does this show we have a creator what meticulously designed it perfectly? No. We haven't seen all the times when the laws of physics weren't capable of sustaining life. The universe could have gone this cycle googleplex times and this might be the very first time that life could exist. What is the evidence of the big bang? The existence of background radiation. The absolutely devastating force of the big bang was predicted to leave the exact amount of radiation that we see in space today after billions of years. Everything is expanding. We can see this from the redshift in galaxies. There is more if needed.AbiogenesisFirst of all, we need a planet with the right conditions. With 100-400 billion planets in our galaxy alone (quick Google search) and with about 100 billion galaxies in our universe (another Google search), there was bound to be at least 1 habitable planet. What is the recipe for life? We need proteins, carbohydrates, nucleic acids, water, and lipids for a primitive cell. In the environment, we need water, a source of energy, and a temperature range that would allow all three states of water to exist. How do we get proteins, carbohydrates, nucleic acids, and lipids? Since earth did have a perfect starting environment (we can assume this since there is indeed life on earth), then we can form the monomers that make up said organic molecules. The Miller-Urey experiment provides the best explanation as to how we formed the monomers. He was able to produce a wide range of organic molecules in an early earth atmosphere. What good is it if all the monomers are great distances apart from each other? Well, that is where the lipids come in. Lipids will spontaneously group up in a pattern as to minimize contact with water in the hydrophobic section of the molecule. When enough of these group up, they form the cell membrane. The cell membrane can group up all the other needed molecules for life. They are permeable to only certain molecules, but they have mechanisms to allow all the needed organic molecules to enter. Given enough time, you will have all the ingredients for life grouped together. If it is needed, there will be more on this topic. Keep in mind, this is still one of the biggest questions in modern biology. Scientists are still wondering how it occurred.EvolutionMacroevolution is the changing of one species into another. This probably occurs due to random mutations. Most mutations are harmful to a species, but that effect is null. When there is a beneficial mutation, it quickly dominates the previous species through natural selection. What evidence do we have? We have countless fossils that show gradual change over millions of years. Check some out on the Smithsonian National Museum of Natural History website. Also, viruses have been seen to evolve over the little time we have actually known about evolution. To see proof of this, check out: http://viralzone.expasy.org...Sources1. http://www.hawking.org.uk...2. Bada, Jeffrey L., and Antonio Lazcano. "Prebiotic Soup--Revisiting the Miller Experiment." Science 300.5620 (2003): 745-746.3. http://humanorigins.si.edu...4. http://viralzone.expasy.org...