In our top science stories this week, data from NASA’s Juno spacecraft helped scientists calculate how much oxygen is being produced on the intriguing Jovian moon Europa (enough for a million humans to breathe a day, according to the study). Back on Ea…

Jupiter’s icy moon Europa produces plenty of oxygen every day, according to new findings based on data from NASA’s Juno spacecraft. The moon has long been of interest to astrobiologists because of the possibility that life could exist in its subsurface…