The second thing I learned is how everything is connected. You often hear spiritual-esoteric people saying things like “we are all one, we are all connected”, in a wispy-wonderous-wavy voice. Inside you are thinking “I want to smash your face with a lemon”. I’m not an esoteric hippy, well not really.
In essence, to understand the system that is “the earth”, you have to study Mathematics, Physics, Biology and Chemistry. Building on these four fundamental natural sciences, you study, among other subjects: