Study recommends mandatory 3-year vacation so astronauts' brains can recover

This reminds me of the Scott and Mark Kelly experiment. Scott went up to the ISS for an extreme duration mission (1 year), while his twin brother Mark, also an astronaut, stayed on earth. We are able to see what genetic changes have occured due to the stay in space. I wonder what papers have come out studying that.

I really wonder why by this time we don't seriously consider an experiment with a centrifuge creating an artificial gravity on ISS. One would thought medical experiments like that are an important part of ISS mission. It does conflicts with some other research topics, which is the main argument for why it's not yet done, but by now it could be done without disturbing micro-gravity too much - there are options - and the topic itself is important enough so the arguments to contrary are wearing thin.