We all know the pictures of the astronauts on the ISS floating around. We also suspect that a lack of gravity is bad for the body as the muscles go weak and such.
Why don’t spaceships just rotate to cause the effect of artificial gravity through centrifugal forces?
yeah 200 mbar of oxygen should be fine, also 0.3g if we’re gonna land on mars eventually we might as well get used to the gravity level.