An instrument on Nasa’s Perseverance rover on Mars has made oxygen from the planet’s carbon dioxide atmosphere. It’s the second successful technology demonstration on the mission, which flew a mini-helicopter on Monday. The oxygen generation was performed by a toaster-sized unit in the rover called Moxie – the Mars Oxygen In-Situ Resource Utilization Experiment. It made 5 grams of the gas – equivalent to what an astronaut at Mars would need to breathe for roughly 10 minutes. Nasa’s thinking is that future human missions would take scaled-up versions of Moxie with them to the Red Planet rather than try to carry from Earth all the oxygen needed to sustain them.(BBC)…[+]