" When we say that the volume of a room is, for example, one hundred cubic meters, we are in effect counting the grains of space-the "quanta of the gravitational field"-that it contains. In a room, this number has more than one hundred digits. When we say that the area of this page is forty-five square inches, we are actually counting the number of links in the web, or loops, that traverse the page. Across the page of this book, there is a number of quanta with more or less seventy digits. "

― Carlo Rovelli , Reality is Not What it Seems: The Journey to Quantum Gravity