Guinea pigs are large for rodents, weighing between 700 and 1200g (1.5-2.5 pounds), and measuring between 20 and 25cm (8–10 inches) in length.[26] They typically live an average of four to five years, and occasionally as long as eight years.[27] According to the 2006 Guinness Book of Records the longest living guinea pig survived 14 years, 10.5 months.[28]
In the 1990s, a minority scientific opinion emerged proposing that caviomorphs, such as guinea pigs, chinchillas and degus, are not rodents and should be reclassified as a separate order of mammals (similar to lagomorphs).[29][30] Subsequent research using wider sampling has restored consensus among mammalian biologists that the current classification of rodents as monophyletic is justified.[31][32]Picture By : hamsteronline.com
Article By : http://en.wikipedia.org/wiki/Guinea_pig#History
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