NASA astronaut Jessica Meir processes blood platelet samples inside the Life Science Glovebox

iss074e0621519 (May 29, 2026) --- NASA astronaut and Expedition 74 flight engineer Jessica Meir processes blood platelet samples inside the Kibo laboratory module’s Life Science Glovebox aboard the International Space Station. Doctors are studying how microgravity alters blood platelets, cell fragments that form clots and prevent bleeding, to protect human health on and off the Earth.