Related by context. Frequent words. (Click for all words.) 56 aviator Charles Lindbergh 53 Thor Heyerdahl 52 Dick Rutan 51 Anne Morrow Lindbergh 51 Albert Hofmann 51 cosmonaut Yuri Gagarin 50 Bernese Oberland 50 Johannes Kepler 50 Yves Rossy 49 Solar Impulse 49 Bertrand Piccard 49 Tenzing Norgay Sherpa 49 Jeana Yeager 49 Piccard 49 sailplane 49 Georges Remi 49 Hempleman Adams 48 conquered Mount Everest 48 Santos Dumont 48 ornithopter 48 Norwegian explorer Roald 48 David Hempleman Adams 48 von Richthofen 48 Ueli 48 supersonic Concorde 47 Saint Exupery 47 Ingemar Stenmark 47 Antarctic explorer 47 alpinist 47 Verbier Switzerland 46 Carl Benz 46 Frank Borman 46 pilot Andre Borschberg 46 Richthofen 46 Kitty Hawk NC 46 summited Everest 46 physicist Albert Einstein 46 Scott Crossfield 46 Bleriot 46 Jacky Ickx 46 Borschberg 46 Nicolas Hayek 46 Esrange 45 Ellison Onizuka 45 Biner 45 polar expeditions 45 scramjet engine 45 Chilean Andes 45 Pen Hadow 45 Koenigssee 45 Reinhold Messner 45 Swiss Alps 45 Saint Exupéry 45 Zermatt Switzerland 45 La Grave 45 Geremek 45 Lafaille 45 PlanetSolar 45 Neuchatel Switzerland 44 hypersonic speeds 44 Jules Verne 44 MacCready 44 Lucca Italy 44 Croizon 44 Chamonix France 44 Proba 2 44 Cassini Huygens 44 conquer Everest 44 Ariane rocket 44 conquered Everest 44 Nadia Styger 44 Bruno Kernen 44 balloonist 44 Virgin Atlantic GlobalFlyer 44 Neuchâtel 44 Apollo lunar 44 Bonatti 44 Bolzano Italy 43 Jura mountains 43 Nepalese Sherpa 43 Stratospheric Observatory 43 Niels Bohr 43 autogyro 43 Soviet cosmonaut Yuri Gagarin 43 Dennis Tito 43 Peter Diamandis 43 Sir Ranulph 43 von Braun 43 wingsuit 43 Viking landers 43 Nick Begich 43 Jimmy Doolittle 43 Gasherbrum II 43 Streif course 43 Felix Gottwald 43 mesosphere 43 Pyrenees Mountains 43 Wernher von Braun 43 Galileo spacecraft 43 Rudolf Diesel 43 Heinrich Heine