Danish engineer and European Space Agency (ESA) astronaut Andreas Mogensen processing blood samples. He is preparing them for stowage inside a research incubator aboard the International Space Station (ISS). This is for research into how microgravity affects cellular immune functions. Mogensen returned to the ISS onboard the SpaceX Dragon 2 spacecraft for his second spaceflight as part of the Huginn mission in August 2023. Photographed on 18 September 2023.