Jupiter’s moon Europa was chosen for a future NASA flagship mission back in the 90s, but by the time the mission was in development, another moon, Saturn’s Enceladus, could have been swapped out as a potentially better option. Scientists hoping to study both with a follow-up mission to Enceladus made a bad gamble, as NASA will probably reduce science funding in the next decade in favor of developing technology for their goal of beating China to Mars–dashing hopes to study Enceladus any time soon.