It's challenging to conduct studies of carcinogenic chemicals on humans, because it would be unethical to knowingly expose humans to high levels of potential toxins.

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• Elon Musk

  Investor

  Monday, Jun 28, 1971
  

• Voltaire

  Writer

  Sunday, Nov 21, 1694
  Saturday, May 30, 1778

• Napoleon Bonaparte

  Military Commander

  Tuesday, Aug 15, 1769
  Saturday, May 05, 1821

• Martin Luther King, Jr.

  Civil Rights Activist

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

• Marcus Tullius Cicero

  Philosopher

  
  

• John F. Kennedy

  35Th U.s. President

  Tuesday, May 29, 1917
  Friday, Nov 22, 1963

• Pope Francis

  Thursday, Dec 17, 1936
  

• Jean De La Bruyere

  Wednesday, Aug 16, 1645
  Thursday, May 10, 1696

• Mae West

  Actress

  Thursday, Aug 17, 1893
  Saturday, Nov 22, 1980

• Socrates

  Philosopher

  Thursday, Jan 01, 1970
  Thursday, Jan 01, 1970

• Steve Jobs

  Entrepreneur

  Thursday, Feb 24, 1955
  Wednesday, Oct 05, 2011

• John C. Maxwell

  Author

  Thursday, Feb 20, 1947
  

• Charles Spurgeon

  Preacher

  Thursday, Jun 19, 1834
  Sunday, Jan 31, 1892

• Michael Jordan

  Basketball Player

  Sunday, Feb 17, 1963
  

• Bob Marley

  Singer

  Tuesday, Feb 06, 1945
  Monday, May 11, 1981