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 Weight 

""The largest known species reached weights of 6 to 8 tons while exceptionally large males may have exceeded 12 tons."" I was intending to add a conversion table to this, but there is a lot of difference in the definition of a ton in different countries, and it's unclear what the author actually meant. Does anyone know what the estimated weight was in kilograms, so I can put in a table to clarfy for readers from different countries?    "