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.
In addition to State executions, three Federal executions have been carried out at San Quentin. Samuel Richard Shockley and Miran Edgar Thompson had been incarcerated at Alcatraz Island federal penitentiary and were executed on December 3, 1948, for the murder of two prison guards during the Battle of Alcatraz.