iss050e054453 (3/4/2017) --- NASA astronaut Peggy Whitson during Microgravity Expanded Stem Cells (MESC) clean up, in the Microgravity Science Glovebox (MSG). Microgravity Expanded Stem Cells observes cell growth and morphological characteristics in microgravity and analyzes gene expression profiles of cells grown in microgravity.
Photographer Shane Kimbrough
Date March 4, 2017