The first person on Mars might be a grandmother. That’s one unexpected possibility discovered by an all-female, six-member international crew that has just returned from Mars, or a reasonable facsimile of it, in the desert of southern Utah. The all-female Mona Lisa Project is the second half of an all-male, then all-female crew experiment by the Mars Society in the remote Mars Desert Research Station to see how different groups perform under conditions resembling those of the Red Planet.