Two Chinese astronauts aboard the Tiangong space station achieved a groundbreaking milestone, completing the longest single spacewalk in history. Shenzhou-19 crew members Cai Xuzhe and Song Lingdong successfully conducted a nine-hour extravehicular activity (EVA), breaking the previous record of eight hours and 56 minutes set by American astronauts James Voss and Susan Helms in 2001. […]