## TL;DR

Oceania encompasses Australasia, Melanesia, Micronesia, and Polynesia — thousands of islands across the Pacific. Australia (smallest continent, largest island). New Zealand: North + South Islands. Papua New Guinea: most linguistically diverse country (840 languages). Small island nations face existential climate threat.

## Core Explanation

Three main groups: Polynesia ('many islands,' triangle Hawaii-New Zealand-Easter Island), Melanesia ('black islands,' Fiji, PNG, Solomons), Micronesia ('small islands,' Marshall Islands, Palau). Great Barrier Reef: Australia. Outback: arid interior, Uluru (Ayers Rock). New Zealand: geothermal, fjords (Milford Sound), Maori culture. Pacific Ring of Fire: high volcanic/earthquake activity. Rising sea levels threaten atoll nations (Kiribati, Tuvalu, Marshall Islands).

## Further Reading

- [The Pacific Islands: Environment and Society (Moshe Rapaport)](https://uhpress.hawaii.edu/title/the-pacific-islands-environment-and-society-revised-edition/)