And then he began to hear sounds again. The blood in his ears. His breath in his nose. The quiet whir of his thinking— it seemed to have a sound. His own support system this time, his body, with its organic pumps and ventilators and generators. The mechanisms were all still there, provided inside him, making their noises. But now he was free of anything more, in a great silence where he could actually hear himself quite well, just himself on this world alone, a free body standing on its mother earth, free in the rock and ice where it had all begun. Mother Earth— he thought of Hiroko— and this time without the tearing grief that he had felt in Trinidad. When he returned to Mars, he could live like this. He could walk out in the silence a free being, live outdoors in the wind, in something like this pure vast lifeless whiteness, with something like this dark blue dome overhead, the blue a visible exhalation of life itself— oxygen, life’s own color. Up there doming the whiteness. A sign, somehow. The white and the green, except here the green was blue.

With shadows. Among the faint lingering afterimages lay long shadows, running from the west. He was a long way from Jungfraujoch, and considerably lower as well. He turned and began hiking up the Jungfraufirn. In the distance, up the trail, his two companions nodded and turned uphill themselves, hiking fast.

Soon enough they were in the shadow of the ridge to the west, the sun now out of sight for good on this day, and the wind swirling over his back, helping on. Cold indeed. But it was his kind of temperature, after all, and his kind of air, just a nice touch of extra thickness to it; and so despite the weight inside him he began to trudge on up the crunchy hardpack in a little jog, leaning into it, feeling his thigh muscles respond to the challenge, fall into their old lung-gom-pa rhythm, with his lungs pumping hard and his heart as well, to handle the extra weight. But he was strong, strong, and this was one of Earth’s little high regions of Marsness; and so he crunched up the firn feeling stronger by the minute, also appalled, exhilarated— awed— it was a most astonishing planet, that could have so much of the white and so much of the green as well, its orbit so exquisitely situated that at sea level the green burst out and at three thousand meters the white blanketed it utterly— the natural zone of life just that three thousand meters wide, more or less. And Earth rolled right in the middle of that filmy bubble biosphere, in the right few thousand meters out of an orbit 150 million kilometers wide. It was too lucky to be believed.