Orville Wright In Wright Flyer 1908
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Manifest Destiny 1873
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Wilbur Wright Pilots Early Glider 1901
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Pioneer Woman Statue, Oklahoma
Richard and Ellen Thane
Marie-sophie Germain, French
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Lincoln Reading To His Son
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Inflight Turn With Wright Glider
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Pioneer 10
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David Livingstone, Scottish Explorer
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Wilbur Wright, 1908
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Edisons Menlo Park Lab
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Semmelweis Puerpural Fever Statistics
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Lincolns Funeral Procession, 1865 #1
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Utopian Flying Machines 19th Century
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Crawford Long, American Pioneer
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American Manifest Destiny, 19th Century
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Clara Barton, American Humanitarian #2
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Pioneer Cemetery At Sunset
Ellen Thane
Pioneer V Satellite
Millard H. Sharp
E. Lillian Todd
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William James, American Psychologist #2
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William And Charles Mayo, American
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Wright Brothers At Kitty Hawk
Mary Evans Picture Library
Orville And Wilbur Wright, 1909
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Edward Jenner Vaccinating Child, C.1796
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Abraham Lincolns Last Portrait Sitting
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Hiking The Pioneer Mountains
William H. Mullins
Autumn In The Pioneer Mountains
William H. Mullins
Jacqueline Cochran, Pioneer Aviatrix
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William Mayo, American Surgical Pioneer
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Ignaz Semmelweis, Hungarian #1
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Henry Ford, American Industrialist
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Operating Amphitheater, Administering
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Lincolns Funeral Procession, 1865
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Thomas Edison, American Inventor #1
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Orville Wright In Wright Flyer 1908
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Edward Jenner, English Microbiologist #16
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Edward Jenner Vaccinating Child, 1796
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Amelia Earhart, American Aviatrix
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Flying Heron, 1886
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Katherine Dunham, American Choreographer
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Wright Brothers Glider, 1902
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Hippocrates, Galen, Avicenna, Ancient
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Pioneer 11
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Pioneer Cabin On Western Frontier, 19th #1
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Pioneer Cabin And Hunters, Western
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Pioneer Cabin On Western Frontier, 19th
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Pioneer Cabin And Hunters, Western #1
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Pioneers With Wagon On Raft, Oregon
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Pioneer Cabin, Yosemite Valley, 19th C
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Pioneer Homestead
John W. Bova
Pioneer 2 Satellite
Millard H. Sharp
Clara Barton, American Humanitarian #3
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Wright Brothers Airplane, Big Kill
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Californian Stagecoaches, 1867
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Ignaz Semmelweis, Hungarian
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Joseph Lister, Father Of Modern
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Abraham Lincoln, 16th American President #1
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Abraham Lincoln, 16th American President #1
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Paul Ehrlich, German Immunologist
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Daniel Bernoulli, Swiss Mathematician
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Thomas Edison, American Inventor
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Chromosome Structure, Salivary Glands
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Thomas Edison, American Inventor
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Elizabeth Blackwell, First Female #2
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A New System Of Chemical Philosophy
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Ignaz Semmelweis, Hungarian #2
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Edward Augustus Holyoke, American #1
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The Last Moments Of President Lincoln
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Paul Ehrlich, German Immunologist
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Mink Trapping, 1862
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The First Day At Jamestown, 1607
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