Photo of Albert Einstein.
Courtesy of Tracey Keifer. Emilio Segre Visual Archives. American Institute of Physics.
Picture of Marie Curie
The Bettmann Archive
Portrait of Edwin Hubble
The Archives, California Institute of Technology
Picture of Max Planck
Courtesy UPI/Bettmann
Picture of Ernest Rutherford
The Bettmann Archive. From painting by James Gunn (1932).
Picture of Linus Pauling
Courtesy UPI/Bettmann
Photograph of Carl Sagan
Robert Reichert and Cornell University.
Picture of Charles Darwin
The Bettmann Archive
Picture of Ben Franklin
Tracey Keifer. Emilio Segre Visual Archives. American Institute of Physics.
Picture of Leonardo DaVinci
The Bettmann Archive
Portrait of Galileo Galilei
Ottavio Leoni, Reunion des Musees Nationaux
Portrait of Neil Armstrong
NASA
Portrait of Sally Ride
NASA
Portrait of John Glenn
Courtesy of NASA
