It is time to replace the ISS with something larger and circular that can spin and create centripal force to emulate some level of gravity equivalent. ISS has been very useful is testing methods of construction in space, but it hasn't been anywhere near ambitious enough. Too many visionless Republicans in Congress. Get rid of them. They don't even understand today, never mind the future. Climate change is still a mystery to them even when the evidence is staying them in the face. Hopeless.