China launched the Shenzhou 23 spacecraft carrying three astronauts to the Tiangong space station, with one crew member scheduled to remain in orbit for about a year to study human adaptability to long-duration flight. The mission coincides with expanded biological research at Tiangong, including the recent delivery of synthetic human embryos intended to study reproduction in microgravity. Station crews may monitor or support these life-science experiments as part of broader efforts to advance human spaceflight capabilities.
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