Expedition 64 Flight Engineer Michael Hopkins checks on biological samples

iss064e011391 (Dec. 8, 2020) — NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins shakes an experiment container containing biological samples to displace bubbles before placing it into the Kubik incubator facility. Hopkins was servicing the samples for the Rotifer-B2 experiment that is exploring the effects spaceflight has on DNA repair mechanisms of the bdelloid rotifer Adineta vaga, a plankton-like microscopic organism.