“That’s right, Daddy’s lost.” Arthur pushed Lori along in her stroller. “Lost.” He flapped his hands out to either side of his body as he emphasized the first consonant sound of the word “L-l-l-lost.” “Where are we?” he crowed, then tickled his daughter’s nose, repeating his query twice, each time speaking in a more elevated sing-song, “Where are we? Where are weeee?” The baby giggled and cooed. She answered with a long happy babble, even offering up a few rewarding “da

Debbie dropped her luggage on the floor of the little efficiency apartment allocated to her in the Bradbury habitat on Mars and sneezed....