![](https://www.windows2universe.org/people/images/pc_Einstein.gif)
Photo of Albert Einstein. Courtesy of Tracey Keifer. Emilio Segre Visual Archives. American Institute of Physics. | ![](https://www.windows2universe.org/people/images/curie.gif)
Picture of Marie Curie The Bettmann Archive |
![](https://www.windows2universe.org/people/images/hubble.gif)
Portrait of Edwin Hubble The Archives, California Institute of Technology | ![](https://www.windows2universe.org/people/images/planck.gif)
Picture of Max Planck Courtesy UPI/Bettmann |
![](https://www.windows2universe.org/people/images/rutherford.gif)
Picture of Ernest Rutherford The Bettmann Archive. From painting by James Gunn (1932). | ![](https://www.windows2universe.org/people/images/pauling.gif)
Picture of Linus Pauling Courtesy UPI/Bettmann |
![](https://www.windows2universe.org/people/images/sagan.gif)
Photograph of Carl Sagan Robert Reichert and Cornell University. | ![](https://www.windows2universe.org/people/images/darwin.gif)
Picture of Charles Darwin The Bettmann Archive |
![](https://www.windows2universe.org/people/images/franklin.gif)
Picture of Ben Franklin Tracey Keifer. Emilio Segre Visual Archives. American Institute of Physics. | ![](https://www.windows2universe.org/people/images/davinci.gif)
Picture of Leonardo DaVinci The Bettmann Archive |
![](https://www.windows2universe.org/people/images/galilei.gif)
Portrait of Galileo Galilei Ottavio Leoni, Reunion des Musees Nationaux | ![](https://www.windows2universe.org/people/images/armstrong.gif)
Portrait of Neil Armstrong NASA |
![](https://www.windows2universe.org/people/images/ride.gif)
Portrait of Sally Ride NASA | ![](https://www.windows2universe.org/space_missions/images/john_glennsm.jpg)
Portrait of John Glenn Courtesy of NASA |