Saw the caption from a different source. Apparently this was part of the research into how people would move around and work in zero gravity. With kittens!
If there’s some other image you think encapsulates the whole SDMB experience, let’s see it.
If any one wants to see the original source, the 1958 Life Magazine article on this research that contained the OP’s picture and others, you can find it here.
I see a future version of 2001: A Space Odyssey, but with the stewardesses on the Pan Am Orion and the Moon Ship being played by kittens and mice with magnets on their feet.