Have you seen Apollo 13? I know it's a Hollywood blockbuster with an A-list cast but I watched it when I was 12 after a visit to NASA in Florida and I knew then that I wanted to be an engineer. There's a bit in the movie where potentially deadly levels of carbon monoxide are filling the space ship. They can't change the filters as they only take square cartridges and the ones the astronauts have are round. The engineers at NASA literally have to work out how to fit a square peg in a round hole.
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