ROSCOSMOS via Reuters
Sputnik/Alexander Kazakov/Kremlin via REUTERS
REUTERS/Alexey Pavlishak
Daniel Slim/AFP via Getty Images
Ministry of Defense of Ukraine
Wu et al. PNAS 2019, doi.org/10.1073/pnas.1902396116
Ukrainian Presidential Press Service/Handout via REUTERS
AP Photo/Leo Correa
NASA/Bill Ingalls
Mikhail Svetlov/Getty Images