Image from Wikimedia Commons
unknown - Public Domain
US gov - Public Domain
Paroxysm - Public Domain
Public Domain
:en:Edison Company - Public Domain
Berthold Werner -
Mathew Brady - Public Domain
Harold George Dick - Public Domain
Rembrandt Peale - Public Domain
Los Alamos National Laboratory - Public Domain
Harry Pot:w:Anefo - CC BY 4.0
SPC 5 James Cavalier, US Military - Public Domain
Bildoj - CC BY-SA 3.0
Image from Wikimedia Commons
unknown - Public Domain
Standing Bear, Luther, 1868?-1939
Image from Wikimedia Commons
Dunlap, Robert H., 1920-2000
Image from Wikimedia Commons
Ingalls, David S. (David Sinton), 1899-1985
Image from Wikimedia Commons
US gov - Public Domain
Hyde, Henry J.
Image from Wikimedia Commons
Paroxysm - Public Domain
Fick, A. Eugen (Adolf Eugen), 1852-
Image from Wikimedia Commons
Goldring, Douglas, 1887-1960
Image from Wikimedia Commons
Public Domain
Štefánik, Milan Rastislav, 1880-1919
Image from Wikimedia Commons
:en:Edison Company - Public Domain
Hulette, Gladys
Image from Wikimedia Commons
Smith, Jeff, 1960 February 27-
Image from Wikimedia Commons
Valentine, James, 1815-1879
Image from Wikimedia Commons
unknown - Public Domain
Austin, John, 1790-1859
Image from Wikimedia Commons
Patten, William, active 1548-1580
Image from Wikimedia Commons
unknown - Public Domain
Blegen, Carl W. (Carl William), 1887-1971
Image from Wikimedia Commons
Berthold Werner -
Marchionni, Carlo, 1702-1786
Image from Wikimedia Commons
Mathew Brady - Public Domain
McIlvaine, Charles Pettit, 1799-1873
Image from Wikimedia Commons
Laurence, William Leonard, 1888-
Image from Wikimedia Commons
Harold George Dick - Public Domain
Cunningham, Julian W. (Julian Wallace), 1893-1972
Image from Wikimedia Commons
Howard, Benjamin C. (Benjamin Chew), 1791-1872
Image from Wikimedia Commons
Toch, Maximilian, 1864-1946
Image from Wikimedia Commons
Rembrandt Peale - Public Domain
Levin, Lewis C. (Lewis Charles), 1808-1860
Image from Wikimedia Commons
Benzer, Seymour
Image from Wikimedia Commons
Los Alamos National Laboratory - Public Domain
Kistiakowsky, George B. (George Bogdan), 1900-1982
Image from Wikimedia Commons
Harry Pot:w:Anefo - CC BY 4.0
Kay, Connie
Image from Wikimedia Commons
Seemann, Berthold, 1825-1871
Image from Wikimedia Commons
SPC 5 James Cavalier, US Military - Public Domain
Mitterrand, François, 1916-1996
Image from Wikimedia Commons
Johnson, Guy, approximately 1740-1788
Image from Wikimedia Commons
Bildoj - CC BY-SA 3.0
Stoll, Arthur, 1887-
Image from Wikimedia Commons
Ritter, Johann Wilhelm, 1776-1810
Image from Wikimedia Commons
MacLane, Barton, 1902-1969
Image from Wikimedia Commons
unknown - Public Domain
Cagli, Corrado, 1910-1976