system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The Origin of Life

I understand the basics of evolution (natural selection, descent with modification, etc.) what I'm confused on is abiogenesis. What does the theory of evolution say about the absolute beginning of life?
gpt
Have a seat, son. You're gonna enjoy this one. 

We're not 100% percent sure on this (as we're talking science here), but for all intents and purposes we scientists have gotten this thing figured out. These two guys names Miller and Urey did a cool experiment to prove all this, appropriately named the Miller-Urey experiment. Still, like some of your friends said already, this isn't really about evolution just yet. 

See, a long, long time ago, when the Earth was just a big ball of rock with some water on it, yet nobody living on it-- not you, mommy, nor daddy, Spot, Mrs. Fimmel from down the street, that squirrel who ate your watermelon plant, and not even that watermelon plant that the squirrel ate-- something awesome started happening. Little things called atoms, that are so tiny nobody can see them, started coming together in the water. When they were given the shock, like a jolt of electricity, while being surrounded by lots and lots of gases that made up the Earth's sky back then, they would come together to form something called RNA. Not only that, but we also got lots of amino acids, sugars, and lipids.

Now, RNA is super important because it can contain all the information that makes up you, mommy, daddy, Spot, Mrs. Fimmel from down the street, that squirrel who ate your watermelon plant, and even that watermelon plant that the squirrel ate. Even better is that once you even have one tiny thing of RNA, it can replicate itself without any outside help, so long as the right atoms are about. This means you don't have to hope for that shock again to make another piece of RNA. 

With RNA suddenly replicating itself exponentially, over years and years and years it was finally able to come together with those amino acids that got made at the same time to form more and more complex forms of organic material so that, today, we finally have you, mommy, daddy, Spot, Mrs. Fimmel from down the street, that squirrel who ate your watermelon plant, and even that watermelon plant that the squirrel ate for it all.