The Concorde was fast and changed how we thought about travel here on Earth. In the future, we may well travel at speeds that change our relationship with time itself. David Parker/Getty Images hide caption

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The Large Hadron Collider's ATLAS detector under construction in 2005. ATLAS is one of the tools physicists are using to try and understand how the universe works. Maximilien Brice/CERN hide caption

itoggle caption Maximilien Brice/CERN

A mentor can help bridge the gulf between having an interest in a subject and actually pursuing that interest through action. Above, a boy gazes up at an image of Albert Einstein on a wall in Tunis, Tunisia. Fethi Belaid/AFP/Getty Images hide caption

itoggle caption Fethi Belaid/AFP/Getty Images