Adult stem cells are also problematic, as they are difficult to identify, purify and grow, and simply may not exist for certain diseased tissues that need to be replaced.

Picture Quotes Maker

Top Authors

• Thomas Sowell

  Economist

  Monday, Jun 30, 1930
  

• Donald Trump

  45Th President Of The United States

  Friday, Jun 14, 1946
  

• Thomas Jefferson

  3Rd US President

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

• Zig Ziglar

  Author

  Saturday, Nov 06, 1926
  Wednesday, Nov 28, 2012

• Thomas Aquinas

  Priest

  Tuesday, Jan 28, 1225
  Wednesday, Mar 07, 1274

• Walt Whitman

  Poet

  Monday, May 31, 1819
  Saturday, Mar 26, 1892

• Deepak Chopra

  Author

  Wednesday, Oct 22, 1947
  

• Samuel Taylor Coleridge

  Poet

  Wednesday, Oct 21, 1772
  Friday, Jul 25, 1834

• Steve Jobs

  Entrepreneur

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

• Michael Jordan

  Basketball Player

  Sunday, Feb 17, 1963
  

• Martin Luther

  Monk

  Saturday, Nov 10, 1483
  Monday, Feb 18, 1546

• John Muir

  Author

  Saturday, Apr 21, 1838
  Thursday, Dec 24, 1914

• Theodore Roosevelt

  26Th U.s. President

  Wednesday, Oct 27, 1858
  Monday, Jan 06, 1919

• Albert Camus

  Author

  Friday, Nov 07, 1913
  Monday, Jan 04, 1960

• Napoleon Bonaparte

  Military Commander

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