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https://the-african-dream.com/2021/01/29/meet-siyabulela-lethuxolo-xuza-a-south-african-engineer-that-invented-a-cheaper-and-safer-rocket-fuel-recognized-by-nasa-and-got-a-planet-named-after-him/
Meet Siyabulela Lethuxolo Xuza: A South African engineer that Invented a cheaper and safer rocket fuel recognized by NASA and got a planet named after him