Background:
Speculation over the existence of a "southern land" was not
confirmed until the early 1820s when British and American commercial
operators and British and Russian national expeditions began
exploring the Antarctic Peninsula region and other areas south of
the Antarctic Circle. Not until 1840 was it established that
Antarctica was indeed a continent and not just a group of islands.
Several exploration "firsts" were achieved in the early 20th
century. Following World War II, there was an upsurge in scientific
research on the continent. A number of countries have set up
year-round research stations on Antarctica. Seven have made
territorial claims, but no other country recognizes these claims. In
order to form a legal framework for the activities of nations on the
continent, an Antarctic Treaty was negotiated that neither denies
nor gives recognition to existing territorial claims; signed in
1959, it entered into force in 1961.