Illustrations noted as “(pd.)” are in the public domain.
Dedication page: The five classical elements. (Lettering by Mrs. Akiko Sato; courtesy of the author)
The Point of Beginning, East Liverpool, Ohio. (Courtesy of the author)
The B-2 bomber squadron at Whiteman Air Force Base. (Courtesy of the US Department of Defense, photograph by SrA Jessica Kachman, June 1998)
William Maclure in New Harmony. (Painting by Thomas Sully, courtesy of the Academy of Natural Sciences, Ewell Sale Stewart Library, Drexel University)
Maclure’s geological map of the United States. (Courtesy of David Rumsey Map Collection, www.davidrumsey.com)
Gouverneur Warren’s 1858 map. (Courtesy of Derek Hayes)
John Wesley Powell. (Courtesy of the Library of Congress)
Steamboat Rock. (Courtesy of the author)
The Grand Canyon of the Yellowstone (Painting by Thomas Moran, 1893; courtesy of the Smithsonian American Art Museum, Washington, DC/Art Resource, NY)
Clarence King in the field. (Courtesy of the US Geological Survey Photographic Library)
Ada Copeland (also known as Mrs. King or Mrs. Todd) with her son Wallace. (Courtesy of the New York Daily News)
The Youghiogheny River. (Courtesy of the author)
A column by “Hercules” in the Genesee Messenger. (Courtesy of The New-York Historical Society)
“Wedding of the Waters” ceremony, New York. (Copyright 1905, C. Y. Turner)
Asian carp. (Courtesy of Nerissa Michaels)
The Chancellor Livingston. (Courtesy of The New-York Historical Society)
Donner Pass. (pd.)
On the 1919 motor convoy. (Courtesy of the National Archives)
The “Good Roads Train.” (Courtesy of Project Gutenberg)
Thomas MacDonald. (Courtesy of the Library of Congress)
“Good Roads Everywhere” map. (Courtesy of Derek Hayes)
Map of the Interstate Highway System. (Courtesy of Derek Hayes)
Opening of the I-94, in Wisconsin. (Courtesy of the Wisconsin Historical Society)
Cal Rodgers. (Courtesy of Stephen White)
Cal Rodgers’s plane. (Courtesy of Stephen White)
Farny’s The Song of the Talking Wire. (Courtesy of the Taft Museum of Art, Cincinnati)
Samuel Morse’s patent, No. 1,647. (Courtesy of the US Patent Office)
Samuel Morse sending the first telegraph message. (© Bettmann/CORBIS)
Telephone wires in New York City. (Courtesy of Stephen White)
Electricity demonstration. (Courtesy of Stephen White)
Nikola Tesla. (pd.)
“PWA Rebuilds the Nation” poster. (Courtesy of David Rumsey Map Collection, www.davidrumsey.com)
Reginald Fessenden and his transmitter lab. (pd.)
Family grouped around a radio receiver. (Courtesy of Stephen White)
Johnny Carson. (pd.)
Joseph Licklider. (pd.)
Vint Cerf. (Courtesy of Joi Ito, 2007)
Robert Kahn. (pd.)
Google server farm. (Photograph by Connie Zhou; courtesy of Google)