Brage Gording Posted over 1 year ago Gian Giudice: Why our universe might exist on a knife-edge While I do understand where you are coming from I believe you are slightly misguided. Why is a question we ask in order to understand what is actually happening, the best example being possibly the first why question of physics: Newton's "If and apple falls to the Earth, why doesn't the moon fall as well?". The beauty of why questions is that they allow us to figure out what is really going on, and then we can exploit this knowledge to create new technological wonders, like satellites, which would not work without Einstein's theory of relativity. As for the fine tuned argument you are not alone, but let me try and persuade you. If any of the physical constants had any other value we would not be able to exist. That is the very constituents of our bodies would not work, and we would never even have been an option of evolution. Indeed, this is true for all life as we know it, the key here being "as we know it". Other constants could possibly allow for other "life", but it would not even remotely resemble anything which you have seen or even thought of (probably, I can't read your mind). So now we as WHY? Why are the constants the way they are? Why aren't they just a fraction of a fraction different, why so precise? One method of trying to solve this is trying to use the equations of physics to find the answer. Like Maxwell did when he found that the speed of light was a result of the permittivity and permeability of the medium. In empty space this means the speed of light must be constant, but it will travel more slowly through air or glass for example. But this only defines one constant in terms of others, not why the constant is. So when theories pop up that predict multiple universes, with the possibility that these constants are different in them, we say MAYBE the reason they are so precise is because if not we simply would not exist, and that there are other universes with vastly different constants, I do hope my rambling has helped, thanks for reading.