I started to post a reply rebutting this and then realised that all of the famous Australians I could think of quickly were... sportspeople or actors. Dammit. 

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And Rupert Murdoch
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42 people are killed by kangaroos each year, in average. They are indeed serious. You're thinking wallabies. BTW check up on drop bears.
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Killers but still not serious

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I think it's the American's that are fascinated with shark documentaries, the Australian's not so much.
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But Australians make them
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I used to run a record label with friends called Votary. We reissued all the old Shark doco soundtracks, and the like. They look unserious, but the music was damn serious. So offended.https://youtu.be/PGHxz4Pe3y0
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This Tweet is unavailable.
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There’s a saying “Australians live for the weekend”. Don’t mistake this for lack of hard work though, we work hard and don’t brag about it

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