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.
First Prisoners Arrive at Alcatraz Prison (Likely Including Al Capone) On August 11, 1934, a group of federal prisoners arrived at Alcatraz Island, a twenty-two-acre rock outcropping one-and-one-half miles offshore in San Francisco Bay.