World political divisions are generally easy to define with a few exceptions where there is uncertainty. However, large parts of the Antarctic are claimed by seven states: Argentina, Australia, Chile, France, New Zealand, Norway, and the United Kingdom. ‘Claiming and negotiating the Antarctic’ looks at the last hundred years, where we see three phases in how the Antarctic has been claimed and colonized. These are: the claiming phase (1908–40); the negotiating phase (1940s–1950s); the post-colonial phase (1960s–onwards). The 1959 Antarctic Treaty stabilized the divisive problem of territorial sovereignty. Article 4 put an end to sovereignty positions and allowed for the emergence of science as the determining factor for shaping access to terrain and data.