LIFESPANS Rodents for comparative aging studies: from mice to beavers uKey words: uAging, Comparative studies, Rodents, Telomerase u u u u u uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC2527635/ Rodents for comparative aging studies: from mice to beavers naked mole-rat squirrel mouse beaver porcupine capybara u u uspecies with large body mass and average lifespan (capybara), ularge body mass and long lifespan (beaver and porcupine), usmall body mass and short lifespan (mouse), uand small body mass and long lifespan (mole-rats). u