These marsupials, named palorchestids, weighed more than a ton and sported permanently-flexed, muscular arms with long claws at the end. They died out far sooner than most of ancient Australia's other mega-fauna, their bones scattered across the continent.

NEWS SOURCE:- https://www.insider.com/ancient-australia-once-home-giant-marsupials-palorchestids-2019-9
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