http://www.mnn.com/earth-matters/animals/stories/10-animals-that-live-the-lo... about long-lived animals was interesting but I warn you its author appears to have been careless and should not be trusted without independent checking. Still, I'd forgot about whales as mammals, and it does appear bowhead whales can have long lifespans, at least 115 years and perhaps as long as 250. The largest animals (whales, elephants) have more darwinian motivation to develop better anti-cancer genes, so it makes sense too. "The bowhead had unique mutations in two genes linked to lifespan in animals... the ERCC1 gene, which is believed to repair DNA, increase cancer resistance and slow aging, and the PCNA gene, which is also linked to DNA repair... Magalhaes is now seeking funding for a project that will insert the whales’ genes into mice to see if that improves..." -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)