Is Australia a (Biogeographic) Island?

From Atlas Pro.

I was always taught there were seven continents, Australia being one of them. However, I’ve been doing this long enough to know many of my international viewers might’ve been taught something else; that Australia is an island within the continent of Oceania. This has in turn generated a lot of confusion surround Australia and its status as a landmass. Of course as we all know, these terms are meaningless, which is why lately we’ve been using biogeographic realms instead. I hope by using these alternative units for dividing the earth, we might finally get to an answer as to whether Australia is an island!

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Sources / Further Reading

https://socialsci.libretexts.org/Bookshelves/Geography_(Human)/Book%3A_World_Regional_Geography_(Finlayson)/10%3A_Oceania/10.03%3A_Biogeography_in_Australia_and_the_Pacific

https://www.cambridge.org/core/books/abs/biogeography-of-australasia/biogeography-of-australia/D7A01EE3EB889451708C7EF4D47FB5AB

https://books.google.com/books?hl=en&lr=&id=v7_nCAAAQBAJ&oi=fnd&pg=PA9&dq=biogeography+of+australia&ots=sqBeL5VmyJ&sig=BKG4de8x4c9y4M4KJyHmfVuMIQA#v=onepage&q=biogeography%20of%20australia&f=false

https://link.springer.com/article/10.1007/BF01454359

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0001858#:~:text=Djarthia%20is%20therefore%20the%20oldest%20known%20Australian%20crown%2Dgroup%20marsupial,oldest%20anywhere%20in%20the%20world.

https://www.science.org.au/curious/earth-environment/story-our-eucalypts#:~:text=Ancient%20eucalypts%20were%20probably%20similar,and%20a%20fire%2Dprone%20landscapes.

https://en.wikipedia.org/wiki/Biogeography#/media/File:Wallace03.jpg

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0001858#:~:text=Djarthia%20is%20therefore%20the%20oldest,marsupial%20by%2030%20million%20years.

https://www.researchgate.net/publication/5487466_Australia’s_Oldest_Marsupial_Fossils_and_their_Biogeographical_Implications

Additional Music:

"Deliberate Thought" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

"Infados" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/