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.
On January 18, 1960, Frank Morris (Clint Eastwood) arrives at the maximum security prison Alcatraz. Soon after arriving, he is sent in to meet the warden (Patrick McGoohan), who curtly informs him that no inmate has ever successfully escaped from Alcatraz.