Image from Wikimedia Commons
Carl Christian Vogel von Vogelstein - Public Domain
unknown - Public Domain
Bain - Public Domain
NASA and John Bedke (STScI) - Public Domain
nn - Public Domain
Unattributed - Public Domain
Sawyer, Wells Moses Artist - Public Domain
United States Congress - Public Domain
John K. Hillers(?) - Public Domain
Anonymous - Public Domain
ÑuÑuX - CC BY-SA 4.0
Joseph Kriehuber Foto: :de:Peter Geymayer - Public Domain
Author of the images is not credited in the book - Public Domain
Alan Light - CC BY-SA 2.0
Julienmorvan - CC BY-SA 3.0
Image from Wikimedia Commons
Rice, Edward E. (Edward Everett), 1848-1924
Image from Wikimedia Commons
Carl Christian Vogel von Vogelstein - Public Domain
Dahl, J. C. (Johan Christian), 1788-1857
Image from Wikimedia Commons
unknown - Public Domain
Schrenck-Notzing, A. von (Albert), 1862-1929
Image from Wikimedia Commons
Adelman, Kenneth L. (Kenneth Lee), 1946-
Image from Wikimedia Commons
Johnson, Robert S., 1920-1998
Image from Wikimedia Commons
Holtz, Lou
Image from Wikimedia Commons
Rosé, Arnold, 1863-1946
Image from Wikimedia Commons
Bain - Public Domain
Clark, F. Ambrose (Frederick Ambrose), 1880-1964
Image from Wikimedia Commons
Lorentowicz, Jan, 1868-1940
Image from Wikimedia Commons
NASA and John Bedke (STScI) - Public Domain
Doxsey, R. (Rodger)
Image from Wikimedia Commons
unknown - Public Domain
Moffat, John, 1841-1918
Image from Wikimedia Commons
nn - Public Domain
Berdyszak, Jan
Image from Wikimedia Commons
Unattributed - Public Domain
Marty, Georges, 1860-1908
Image from Wikimedia Commons
Sawyer, Wells Moses Artist - Public Domain
Eastman, Charles Alexander, 1858-1939
Image from Wikimedia Commons
United States Congress - Public Domain
Brownson, Charles B. (Charles Bruce), 1914-1988
Image from Wikimedia Commons
John K. Hillers(?) - Public Domain
Young Man Afraid of His Horse, 1836-1893
Image from Wikimedia Commons
Horniman, Annie Elizabeth Fredericka, 1860-1937
Image from Wikimedia Commons
Anonymous - Public Domain
Beaumont, Christophe de 1703-1781
Image from Wikimedia Commons
ÑuÑuX - CC BY-SA 4.0
Dorticós Torrado, Osvaldo, 1919-1983
Image from Wikimedia Commons
Davis, Robert Thompson, 1823-1906
Image from Wikimedia Commons
Joseph Kriehuber Foto: :de:Peter Geymayer - Public Domain
Endlicher, Stephan, 1804-1849
Image from Wikimedia Commons
Author of the images is not credited in the book - Public Domain
Lanrezac, Charles Louis Marie, 1852-1925
Image from Wikimedia Commons
Atchison, David Rice, 1807-1886
Image from Wikimedia Commons
Ditmars, Raymond Lee, 1876-1942
Image from Wikimedia Commons
Campbell, John W. (John Wilson), 1782-1833
Image from Wikimedia Commons
Alan Light - CC BY-SA 2.0
Gardenia, Vincent
Image from Wikimedia Commons
Gabriel, Peter, 1950-
Image from Wikimedia Commons
Novello, Vincent, 1781-1861
Image from Wikimedia Commons
Bastien-Lepage, Jules, 1848-1884
Image from Wikimedia Commons
Julienmorvan - CC BY-SA 3.0
Bonitzer, Pascal