University of Groningen
American History: Outlines: Westward Expansion
This article offers a detailed history of early 19th century westward migration and the social diversity of the pioneers moving west.
Encyclopedia Britannica
Encyclopedia Britannica: Charles Henry Turner
This entry from Encyclopedia Britannica features Charles Henry Turner, an American behavioral scientist and early pioneer in the field of insect behavior. He is best known for his work showing that social insects can modify their...
National High Magnetic Field Laboratory
Magnet Academy: Lee De Forest
American inventor Lee De Forest was a pioneer of radio and motion pictures. He received more than 300 patents over the course of his lifetime, the most important of which was for a three-electrode vacuum tube, or triode, that he called...