jsc2025e065387 (1/10/2025) --- The BioCell sample holder for the Microgravity Associated Bone Loss-B (MABL-B) investigation packed for launch to the International Space Station. The six-well BioCells are housed in a Plate Habitat (PHAB), which provides secondary containment and structural support during launch and return. MABL-B assesses how bone-forming stem cells respond to microgravity. Results could provide a better understanding of what causes bone loss during spaceflight and from normal aging and disease on Earth and support development of treatments. Credit: Mayo Clinic