Theorists write all the popular books on science: Heinz Pagels, Frank Wilczek, Stephen Hawking, Richard Feynman, et al. And why not? They have all that spare time.

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• John C. Maxwell

  Author

  Thursday, Feb 20, 1947
  

• Martin Luther King, Jr.

  Civil Rights Activist

  Tuesday, Jan 15, 1929
  Thursday, Apr 04, 1968

• Mahatma Gandhi

  Civil Rights Leader

  Saturday, Oct 02, 1869
  Friday, Jan 30, 1948

• Khalil Gibran

  Poet

  Saturday, Jan 06, 1883
  Friday, Apr 10, 1931

• Barack Obama

  44Th U.s. President

  Friday, Aug 04, 1961
  

• Lucy Larcom

  Poet

  Friday, Mar 05, 1824
  Monday, Apr 17, 1893

• Thomas Jefferson

  3Rd US President

  Saturday, Apr 13, 1743
  Tuesday, Jul 04, 1826

• Joe Biden

  Vice President Of The United States

  Friday, Nov 20, 1942
  

• Carl Sagan

  Astronomer

  Friday, Nov 09, 1934
  Friday, Dec 20, 1996

• Kobe Bryant

  Basketball Player

  Wednesday, Aug 23, 1978
  

• H. L. Mencken

  Journalist

  Sunday, Sep 12, 1880
  Sunday, Jan 29, 1956

• Rodney Dangerfield

  Comedian

  Tuesday, Nov 22, 1921
  Tuesday, Oct 05, 2004

• Leonardo Da Vinci

  Painter

  Thursday, Apr 15, 1452
  Friday, May 02, 1519

• Pope John Paul Ii

  Priest

  Tuesday, May 18, 1920
  Saturday, Apr 02, 2005

• Pope Francis

  Thursday, Dec 17, 1936