First oxygen made on another planet
Hoffman, Hecht and colleagues reported MOXIE produced oxygen from Martian atmospheric CO2 by solid oxide electrolysis seven times in 2021, the first demonstration of in situ resource utilization on another planet.
As reported in: Hoffman, Hecht, Rapp et al. (2022). Mars Oxygen ISRU Experiment (MOXIE)—Preparing for human Mars exploration. Science Advances. doi:10.1126/sciadv.abp8636