[quote]Then why don't we see this happening on a normal basis today. Those molecules are abundant on earth. Hypothetically speaking, shouldn't this still be observable in nature?[/quote] Because life actively happens. Our rationalization concludes something was either alive or dead, not inorganic, organic, then compost. Life could be popping up in front of your very eyes, for example, tardigrades, extremely small lifeforms that can be "dead", or rather dormant for over 10 years, only to be reanimated by a single drop of water. These complex lifeforms are strangely the most likely to ever "pop up" or "begin existing" due to their scale, yet could you ever imagine trying to observe it's process in the wild? These things smaller than the eye of a needle... Could you imagine how hard it would be to look at literally nothing, just to observe what nothing might do? It takes an extremely long time for elements to come together to make even a small lifeform such as. Then we get into dietary complexities where sizes begin to vary. If we go back a few million years, we can observe periods in which our atmosphere had access to more nitrogen and oxygen. During this time, we see vegetation grow MUCH larger, resulting in larger courses with MUCH less proteins per serving. This resulted in larger dinosaurs to deal with the larger trees and vegetation. What I aim to discuss is that once life gets on track, it constantly resists it's conditions. That's why we have hair to deal with cold weather, muscles to work hard and fast and consciousness for decision making.