We do know that smaller (shorter lived) mammals at least have significantly shorter telomeres than humans. Here's a paper comparing max life span (MLS) against

We do know that smaller (shorter lived) mammals at least have significantly shorter telomeres than humans. Here's a paper comparing max life span (MLS) against body temperature, body mass, and telomere length. [1] [1] http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3680702/figure/F1/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3680702/figure/F...