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Published online 15 January 2008 | Nature | doi:10.1038/news.2008.441

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Rodent of unusual size discovered

Uruguayan skull points to 'rat' that weighed a tonne.

It’s definitely not a rodent you’d want to wrestle with. A fossil found along the South American coast hints that a beast weighing more than 1,000 kilograms once roamed there.

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