The Axiom of Choice, first created by Ernst Zermelo in 1904, states that for any collection of sets, you can always choose one element from each set simultaneously to create a new set, even if the sets or collections are infinite. Because of the controversy revolving around this topic, there have been many arguments on whether the Axiom of Choice is even true as it can't be proven.

NASA and its international partners have approved the crew for Axiom Space’s fourth private astronaut mission to the International Space Station, set to launch from Florida in spring 2025. The Axiom Mission 4 (Ax-4) will launch aboard a SpaceX Dragon spacecraft and aim to spend up to 14 days at the space station, focusing on scientific, outreach, and commercial activities.