Many people are surprised when they first see a graph of the carbon dioxide levels measured at Mauna Loa in Hawaii. The first question asked is why is it going up and down each year? The answer is that you are looking the Earth breathing!
String theory says we live in a ten-dimensional universe, but that only four are accessible to our everyday senses. According to theorists, the missing six are curled up in bizarre structures known as Calabi-Yau manifolds. In The Shape of Inner Space, Shing-Tung Yau, the man who mathematically proved that these manifolds exist.