These giant 'drop bear' in Australia grew huge?

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These giant ‘drop bear’ with opposable thumbs once scaled trees in Australia but palaeontologists wonder how did they grow so huge?

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These giant 'drop bears' with opposable thumbs once scaled trees in Australia. But how did they grow so huge?

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These giant 'drop bears' with opposable thumbs once scaled trees in Australia. But how did they grow so huge?

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These giant 'drop bears' with opposable thumbs once scaled trees in Australia. But how did they grow so huge?

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