The Economic Times

In 2025, China sent four mice to Tiangong for about two weeks; one female later produced three litters of 9, 10, and 9 pups after returning to Earth

In a groundbreaking Chinese space experiment, four mice were sent into orbit for two weeks. Remarkably, one female mouse returned and gave birth to three litters with pups larger than average. These mice's genetic similarities to humans make them invaluable for scientific studies. Prior research has also confirmed that male mice can reproduce post-space travel, paving the way for deeper insights into mammalian reproduction in space environments.