Two hundred ships moved through the stars, leaving an iridescent trail of transmission beacons in their wake. Five billion kilometers long, the beacons stretched all the way to Earth, a desiccated and shaken planet that the passengers once called home. Sometimes simple messages from the ships arrived in the data. After a long time, images came and—after an even longer time—clips of the passengers going about their lives. But the vast distances meant these clips were rare. Normally an image arriving on Earth was cause for celebration, because it meant the crew was still alive, or at least the ship’s systems were still functioning.

The mountains were beautiful, even though the roads that took you there were broken. Even though the whole world was broken. Tara sat on the side of the pitted road, soaking in the autumnal sun, gazing at the distant snow-capped peaks in awe. Forgetting, for the moment, the ache in her feet and the emptiness in her stomach. “The Sivalik Range, children,” said Anju, pointing at the green hills that rose around them. “The word literally means the ‘tresses of Shiva.’ Cross the valley, and you stand at the feet of Pir Panjal, the inner Himalayas.”

When Tommy Burke took me out to Gundark Island to see the alien, I wasn’t really expecting much. Maybe I was just going because I thought it would be cool to take a ride in Tommy’s canoe. Or maybe I was just hoping Tommy might turn out to be a friend. If there really was an alien there, too, then all the better. After passing a hand-painted sign that said “Please Don’t Feed the Alien,” we came to a clearing in the middle of the island where I saw a lump in the ground. At first it looked like a small boulder, except that it had a grayish-purple tint to it. Upon closer inspection it vaguely appeared to have scales.

My children do not dream and neither do I. But that does not mean our sleep is sound. Sometimes they wake in the middle of the night, eyes wide and wet, grasping for a reason they stare into the darkness. I wish I could tell them it was a nightmare, that whatever they are feeling isn’t real, but instead I tell them to close their lids and lay lightly back into sleep, which they always do. My children are good at taking orders.

Seth Calder felt like he had barely dozed off when his alarm blared at 6:00 a.m. Level morning sunlight leaked through the blinds onto the birch and linen furniture of his Stockholm apartment. Amalia was already in the shower, so he lurched out of bed and went to check his news feed. NASA TO LAUNCH MARS CREW TODAY, said the first headline. The picture showed the ten crew members in flight suits, grinning at the camera.

Home. He recognizes the name of the street. But he doesn’t remember the landscape. He recognizes the address on the mailbox. But he doesn’t remember the house. His family is waiting for him on the porch. Everybody looks just as nervous as he is. He gets out. The police cruiser takes back off down the gravel drive, leaving him standing in a cloud of dust holding a baggie of possessions.

It’s not unusual to hear music in a spaceport arrival lounge. After all, if aliens didn’t enjoy music, I’d never have been able to travel. But this sounded familiar. Disturbingly familiar. Standing in line, I felt a sinking sensation as the tune wound its way to its conclusion. It was The Beatles. Millions of light years from Earth and I was listening to The Beatles. How did I feel?