Evolution proceeds without regard for complexity, efficiency, or anything else for that matter, except survival. I think the most common misconception about evo

Evolution proceeds without regard for complexity, efficiency, or anything else for that matter, except survival. I think the most common misconception about evolution is that it is not a system of "best" but rather "just good enough". For example, do you like your lungs? They work pretty well, right? But how long can you hold your breath under water? Obviously cetaceans have much better lungs that humans, but that's because our lungs are just good enough for running around on a savannah. If we were forced to dive to incredible depths to search for our food, we'd need to evolve better lungs, as the cetaceans have done. Before the dolphins get to smug, though, they don't have the best lungs either. The title of best lungs goes to the birds. Whereas all other air breathing animals have bidirectional flow in their lungs, birds have evolved a system of continuous unidirectional flow. Turns out that bidirectional flow is not good enough at high altitudes with an extremely high metabolic rate. As for what makes Biology and Medicine difficult, I think the answer is: time. That is, aside from dealing with systems composed of more moving parts than physics or chemistry, biology is also less open to direct manipulation and experiments take, on average, much longer for the amount of information gained. Eventually, though, I don't doubt that we will understand biology as well as we understand the other two. At the moment we're in the "alchemy" stage of biological research. We have a sense that there are units of action and rules governing these units, but we don't know what those units are or how they interact. A rock you dig up from the ground is, also, a rather complex system difficult to understand until you have knowledge of chemicals, molecules, bonding, etc. We just need to figure out what the "atoms" of biology are.