CASIS Protein Crystal Growth (PCG) 8

iss056e075950 (July 3, 2018) --- Astronaut Alexander Gerst of ESA (European Space Agency) works inside the Japanese Kibo laboratory module retrieving Protein Crystal Growth samples from a science freezer, also known as the Minus Eighty-Degree Laboratory Freezer for ISS (MELFI).

Photographer Drew Feustel