 that we do see an effect of the radiation and we see it in several ways we see it in the blood we see it in urine we see it in the body's response to the radiation that the repair mechanisms in the body are activated because they can sense the damage as well and so we see actually there's some longer telomeres on average when you're in space but these caps at the end of your chromosomes that keep your dna intact are also shorter when you get back to earth so we think