Soak an egg in vinegar. 2 days later, the outcome is incredible

It's the most classic science experiment out there: What happens to an egg when you soak it in vinegar for over two days? As demonstrated in the video above, after two days the vinegar dissolves the eggshell. The real magic? Two events occur. First, the egg bounces! Second, the egg yolk is completely unfazed by vinegar. Why does this happen? The egg shell contains calcium carbonate crystals, which are then broken down when interacting with the acetic acid in vinegar. The end-resulting membrane, after the shell dissolves, is also semipermeable and rubbery in texture.