“As Stephen Jay Gould has pointed out in evolution, once all the simple ways to live are exhausted, the only way to create a new species or niche is to become more complex [48]. In other words, there are only so many ways of being a bacteria. That’s why increasing complexity is almost inevitable if evolution is to continue. But these increases in complexity are not arbitrary. Rather, they reflect the properties of the world in which evolution takes place: Eyes represent the presence of light in the universe. Ears signify mechanical vibration. Legs are reflections of gravity, and lungs of oxygen.”