Modern living is a microdose of space travel Sitting at a desk all day? Damaging muscles and bones like micro gravity Lack of circadian rhythm in the space station? We did that to ourselves with modern lighting. Blue light speeds up aging by damaging melanopsin in the eye. Melanopsin is the ignition to everything you want Poor immune and thymus function? Has anyone looked at their absolute lymphocyte count? Modern stress, sleep deprivation have sped run thymic involution.