Nature can’t (or at least has a very hard time) climb out of the local minima it has created. The gallbladder has a heap of design flaws but it is quite useful

Nature can’t (or at least has a very hard time) climb out of the local minima it has created. The gallbladder has a heap of design flaws but it is quite useful (until it causes problems). Bird lungs would be much more efficient a design as they don’t have dead space in the way ours do. And having 2 of an organ has more to do with our bilateral body symmetry which was an early evolutionary choice of our line than anything else