The Lightness of Being: Mass, Ether, and the Unification of Forces

A Nobel-prize winning physicist takes on the essential question: what are we made of?

Our understanding of nature's deepest reality has changed radically, but almost without our noticing, over the past twenty-five years. Transcending the clash of older ideas about matter and space, acclaimed physicist Frank Wilczek explains a remarkable new discovery: matter is built from almost weightless units, and pure energy is the ultimate source of mass. He calls it "The Lightness of Being." Space is ...