The largest rodent ever recorded, discovered in Uruguay, might not have been as large as it was first thought to be.This is the result of a reorganization made by Uruguayan researchers on the study. They thought the largest rodent, Josephoartigasia monesi had weighed around a ton, but new studies reveal that it could have been just around a third of that.
More details here in BBC.
News: BBC NEWS | Science/Nature | Biggest rodent 'shrinks in size'