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.
LOCATION: Alcatraz Prison Museum National Park is located out in the middle of San Francisco Bay, on Alcatraz Island, which is next to Angel Island. The water is very cold and the currents are very strong, making it a great place for a prison. Tours for Alcatraz Island are available. Reservations are a must, call: (415) 546-9400.