> How did they conclude it was both significant and caused by radiation? 24 people from a similar background and age is less than 24 people. Quote from the abs

> How did they conclude it was both significant and caused by radiation? 24 people from a similar background and age is less than 24 people. Quote from the abstract: > To test a possible mechanistic basis for these findings, a secondary purpose was to determine the long-term effects of simulated weightlessness and space-relevant total-body irradiation on vascular responsiveness in mice. The results demonstrate that space-relevant irradiation induces a sustained vascular endothelial cell dysfunction. Such impairment is known to lead to occlusive artery disease, and may be an important risk factor for CVD among astronauts exposed to deep space radiation. They didn't just do some poor statistics with a low sample size. So, their findings suggests that low gravity for a 6 month period doesn't affect the health of the mice but the radiation does. Not far off what we already suspected but with a small twist (cancer was probably considered a bigger risk than CVD).