NASA astronaut Chris Williams swaps computer components inside scientific hardware

iss074e0316004 (Feb. 18, 2026) --- NASA astronaut and Expedition 74 flight engineer Chris Williams swaps computer components inside scientific hardware in the International Space Station’s Kibo laboratory module. The research gear enables studies of the effects of spaceflight on the molecular and chemical interactions between beneficial microbes and their animal hosts to help preserve astronaut health on long‑duration space missions.