"China's Space Station Welcomes Aquatic Residents: Fish Sent for Research"

China is sending zebrafish to its Tiangong space station to study how microorganisms interact in a closed ecosystem and to research the potential loss of bone density in astronauts during prolonged periods in microgravity. Previous studies with fish in space have shown that they adapt to weightlessness and use light to orient themselves. The zebrafish will provide further insights into the effects of extended space travel on bone density.