Naked mole rat
The DNA repair transcriptomes of the liver of humans, naked mole rats and mice were compared.  The maximum lifespans of humans, naked mole rats, and mice are respectively ~120, 30 and 3 years.  The longer-lived species, humans and naked mole rats, expressed DNA repair genes at a higher level than did mice.  In addition, several DNA repair pathways in humans and naked mole rats were up-regulated compared with mice.  These findings suggest that increased DNA repair makes for greater longevity. The findings are consistent with the DNA damage theory of aging.