It is amazing when you realize that nearly nothing in existence is as solid as it seems. Unless cooled down to excessive degrees, everything moves and vi- brates constantly. When you dive into the world of par- ticles, it's all vibration. Not even the particles are solid. They're just oscillating forms of energy. All this is so obvious to us that we only know it from science class. There we first learnt about particles like miniature mar- bles orbiting an atomic nucleus. Later we learnt that those balls don't really exist. Enter quantum physics where even stranger concepts are sprung on us. Nev- ertheless, we can only live by the grace of these ele- mentary particles.