In a period of ravenous consumption, a caterpillar eats many times its weight each day, until it is too bloated to continue. It forms a chrysalis and it’s structure dissolves. Dormant cells called imaginal cells begin to appear as single-cell organisms. They are at first attacked and killed by the caterpillar’s immune system, but eventually overwhelm it. The imaginal cells persist and, feeding on the meltdown of the caterpillar’s body, quickly begin acting as a multi-cellular organism. And a butterfly is born.