NASA astronaut Zena Cardman installs liver tissue samples into an artificial gravity generator

iss073e0545092 (Aug. 26, 2025) --- NASA astronaut and Expedition 73 Flight Engineer Zena Cardman works inside a portable glovebag aboard the International Space Station's Harmony module. Cardman was installing experiment modules containing liver tissue into an artificial gravity generator for a biotechnology investigation exploring how bioprinted, or engineered, liver tissues containing blood vessels behave in microgravity. Results may improve long term health for astronauts and improve quality of life for patients on Earth.