In the quest to understand our world and the universe in which it sits, Marcelo Gleiser advises: "Not all questions have answers. To hope that science will answer all questions is to want to shrink the human spirit, clip its wings, rob it from its multifaceted existence." Goddard/Arizona State University/NASA hide caption

itoggle caption Goddard/Arizona State University/NASA

High-energy physics in action: an image of an event in CERN's CMS detector during the search for the Higgs boson. CERN hide caption

itoggle caption CERN