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Australasia is a subregion of Oceania, comprising Australia, New Zealand (overlapping with Polynesia), and sometimes including New Guinea and surrounding islands (overlapping with Melanesia).
Australasia, geographical term that has never had a precise definition and that was originally employed to denote land believed to exist south of Asia. In its widest sense it has been taken to include, besides Australia (with Tasmania) and New Zealand, the Malay Archipelago, the Philippines,
Australasia is a term used to describe a region within Oceania. The physical countries, islands or regions that comprise Australasia vary greatly depending upon the sources cited. The most commonly used include: the nations of Australia and New Zealand; islands of the South Pacific, including Australia, New Zealand, New Guinea, and adjacent islands
In the 19th century, many geographers divided Oceania into mostly racially based subdivisions: Australasia, Malesia (encompassing the Malay Archipelago), Melanesia, Micronesia and Polynesia.
Australasia, also called Oceania or Australasia/Oceania, is the World’s smallest continent – 8,112,000 km² covering approximately 5.3% of the Earth’s land and 1.5% of the Earth’s surface.
Australasia is one of the world's geographical regions. It is unified in natural history and geology because of its ancient origin as part of the supercontinent Gondwana. It is the geographical area which contains the Australasian ecozone.
Australasia Region that includes Australia, New Zealand and Papua New Guinea. The term Australasia is inexact. It is sometimes used to include various Asian countries (usually Indonesia and Malaysia), or extended to include Pacific island groups and the Australian and New Zealand territories in Antarctica.
Oceania is a region made up of thousands of islands throughout the Central and South Pacific Ocean. It includes Australia, the smallest continent in terms of total land area. Most of Australia and Oceania is under the Pacific, a vast body of water that is larger than all the Earth’s continental landmasses and islands combined.
Australasia is a unique geographical and ecological zone compromised of Australia, New Zealand, New Guinea, and other small islands nearby.
From an ecological perspective the Australasian realm is a distinct region, parts of which have a common geologic and evolutionary history. The entire area has experienced a long period of biological isolation from other regions, and thus harbors a great many unique plants and animals.