https://www.cnet.com/news/elon-musk-hints-spacex-running-track-will-be-2001-a-space-odyssey-inspired/

Elon Musk has revealed his hope to make an iconic 1968 sci-fi image a reality with his SpaceX BF Spaceship.

"Running track in @SpaceX BF Spaceship will look something like this," said Musk in a tweet on Friday, referencing 2001: A Space Odyssey in an attached GIF.