Last year, the team made headlines when it published a paper describing how metal lumps at the bottom of the Pacific Ocean seemed to produce oxygen without sunlight ...
Inside a giant sphere, the engineers pored over their equipment. Before them stood a silvery metal contraption swathed in colourful wires – a box that they hope will one day make oxygen on the moon.
but other scientists have also encountered unexpected oxygen molecules in remote, light-deprived places. Sweetman said that dark oxygen production may be a wider phenomenon that has been overlooked.