>>55788338And those clash with certain style guides (The AP Stylebook and AMA Manual of Style)
Both Mars' and Mars's are correct, depending on which style you follow, but Mars's is the more recommended one.
At worst, Mars' is discouraged, but not actually wrong.
>>55788303>Maybe because for classical and biblical names there are other rulesMars is classical, but the common exception is only for two syllable names that end in s, not single syllable ones.
Jesus or Achilles would be Jesus' and Achilles', but a single syllable like Zeus or Mars would use Zeus's or Mars's.
