First off, there is more than one kind of stem cell. Human stem cells are unique because they have the potential to become a specialized cell and can divide and renew themselves, according to the National Institutes of Health.
Doing Time as a Federal Prison: 1934-63. In 1933, the Army relinquished Alcatraz to the U.S. Justice Department, which wanted a federal prison that could house a criminal population too difficult or dangerous to be handled by other U.S. penitentiaries.
The greatest change at Alcatraz, however, was the army's decision to. incarcerate all military prisoners returning from the Philippines who had time yet to serve. During the summer of 1899 the average prison population on the island was 25. In April 1900 the number of convicts jumped to 441, and Alcatraz's garrison more than doubled at the same time.