There were two of them, in walkers and scratched old helmets. Through their faceplates he could see them: a woman with a face like a hawk’s, who looked like she would be happy to bite him; and a short thin-faced black man, with gray dreadlocks crowding the border of his faceplate, like the rope picture frames one sometimes sees in nautical restaurants.

It was the man who had tapped Art on the shoulder. Now he lifted three fingers, pointing at his wrist console. The intercom band they were using, no doubt. Art switched it on. “Hey!” he cried, feeling more relieved than he ought to, considering that this was probably Nirgal’s setup, so that he had never been in danger. “Hey, I seem to be locked out of my car? Could you give me a lift?”

They stared at him.

The man’s laugh was scary. “Welcome to Mars,” he said.

Part 3: Long Runout

Part Three

Long Runout

Prologue

Ann Clayborne was driving down the Geneva Spur, stopping every few switchbacks to get out and take samples from the roadcuts. The Transmarineris Highway had been abandoned after ‘61, as it now disappeared under the dirty river of ice and boulders covering the floor of Coprates Chasma. The road was an archaeological relic, a dead end.

But Ann was studying the Geneva Spur. The Spur was the final extension of a much longer lava dike, most of which was buried in the plateau to the south. The dike was one of several— the nearby Melas Dorsa, the Felis Dorsa farther east, the Solis Dorsa farther west— all of them perpendicular to the Marineris canyons, and all mysterious in their origin. But as the southern wall of Melas Chasma had receded, by collapse and wind erosion, the hard rock of one dike had been exposed, and this was the Geneva Spur, which had provided the Swiss with a perfect ramp to get their road down the canyon wall, and was now providing Ann with a nicely exposed dike base. It was possible that it and all its companion dikes had been formed by concentric fissuring resulting from the rise of Tharsis; but they could also be much older, remnants of a basin-and-range type spread in the earliest Noachian, when the planet was still expanding from its own internal heat. Dating the basalt at the foot of the dike would help answer the question one way or the other.

So she drove a little boulder car slowly down the frost-covered road. The car’s movement would be quite visible from space, but she didn’t care. She had driven all over the southern hemisphere in the previous year, taking no precautions except when approaching one of Coyote’s hidden refuges to resupply. Nothing had happened.