ISTANBUL Chinese astronauts aboard the Tiangong space station have successfully conducted groundbreaking experiments to produce oxygen and components for rocket fuel, according to a report. The crew of the Shenzhou-19 mission carried out the world’s first in-orbit artificial photosynthesis experiments, creating oxygen and ethylene, the South China Morning Post reported Monday. The 12 experiments, aimed at enhancing human survival and advancing space exploration, are expected to play a critical