Mars Oxygen ISRU Experiment

The Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) is a technoligical experiment on the NASA Mars 2020 rover "Perseverance" trying to find out if oxygen can be created on Mars by using carbon dioxide. 
On April 20, 2021, MOXIE produced oxygen from carbon dioxide in the Martian atmosphere by using solid oxide electrolysis. This was the first experimental extraction of a natural resource from another planet for human use. 
The technology may help a possible human mission to the planet to provide breathable oxygen.