Social Sciences and History / Unit 12 SSH 1137 short lesson, about 20 seconds
Oceania: Isolation, Biogeography, the Seas
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The idea
Oceania, Australia, the Pacific islands and the polar regions, is united by isolation. Under the Law of the Sea, territorial waters run twelve miles, exclusive economic zones beyond. Biogeography explains its unique wildlife; Wallace drew the boundary.
In practice
Aborigines forty to fifty thousand years ago; New Zealand settled last.
Where people slip
Invasive species cost Australia billions yearly.
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