Not exactly twins, but one of them – Scott was for a year in space. After his return, NASA study is saying: “For example, researchers in one study were surprised to find that Scott’s telomeres — the protective caps that shield the ends of DNA strands — were longer than Mark’s. And previous research has shown that longer telomeres are associated with fewer age-related problems”.
So, finally, we have the alternative way to extend telomeres! 🙂