publication date: Tuesday, April 23, 2013 (part of Spring 2013)
clue: This German inventor of the hang glider died a few short years before his rivals in Kitty Hawk conquered the skies forever.
explanation: Lillienthal had a professional rivalry with Orville and Wilbur Wright. more…
solved by: Russ Wilhelm, Steve West, LaVonne Lemler, Samir Mehta, Chris Lemler, Justin Woods, Matthew Preston, Joanna Woods, Richard Slominsky, Denise Sawicki, Mike Rothstein, Steve Dunn, and Scott Horowitz