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flag A Chinese space mission returned a female mouse that gave birth to six healthy pups, proving mammals can reproduce in space.

flag A female mouse that flew aboard China's Shenzhou-21 mission returned to Earth in November 2025 and gave birth to nine healthy pups, six of whom survived, marking China’s first full-cycle mammalian space experiment. flag The mouse, part of a group of four, spent about two weeks on the Tiangong space station, with researchers confirming that short-term space travel did not impair her reproductive ability. flag Despite a food shortage caused by a mission schedule change, ground teams used soybean milk as a temporary feed substitute and delivered water via a dedicated port, while an AI system monitored the mice’s behavior. flag The offspring are developing normally, with the mother nursing effectively. flag Scientists will continue studying their growth and future reproductive potential to assess long-term and multigenerational effects of space exposure, advancing research on mammalian reproduction in microgravity.

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