Physicist Quotes and aphorisms about hard Michio Kaku ,, Years ago, I picked up figure skating. How hard could spins and jumps be, I thought? It's just appl... Brian Greene Brian Greene Brian Greene Wolfgang Ketterle Kip Thorne Leonard Mlodinow Barry Barish ,, It's hard to do large, expensive projects without some sort of hierarchical structure where somebod... Barry Barish Barry Barish