She drove onto its lower slopes, gentle and wavy. Ascraeus had been one of the classic albedo feature names, as it was a mountain so big it was easily visible from Earth. Ascraeus Lacus. This was during the canal mania, and so they had decided it was a lake. Pavonis in that era had been called Phoenicus Lacus, Phoenix Lake. Ascra, she read, was the birthplace of Hesiod, “situated on the right of Mount Helicon, on a high and rugged place.” So though they had thought it a lake, they had named it after a mountain place. Perhaps their subconscious minds had understood the telescope images after all. Ascraeus was in general a poetic name for the pastoral, Helicon being the Boetian mountain sacred to Apollo and the Muses. Hesiod had looked up from his plow one day and seen the mountain, and found he had a story to tell. Strange the birth of myths, strange the old names that they lived among and ignored, while they continued to tell the old stories over and over again with their lives.

It was the steepest of the big four volcanoes, but there was no encircling escarpment, as around Olympus Mons; so she could put the rover in low gear and grind on up, as if taking off into space, in slow motion. Lean back in her seat and take a nap. Head on the headrest; relax. Wake up on arrival, up at twenty-seven kilometers above sea level, the same height as all the other three big ones; that was as high as a mountain could get on Mars, basically, it was the isostatic limit, at which point the lithosphere began to sag under the weight of all that rock; all of the big four had maxed out, they could grow no higher. A sign of their size and their great age.

Very old, yes, but at the same time the surface lava of Ascraeus was among the youngest igneous rock on Mars, weathered only slightly by wind and sun. As the lava sheets had cooled they had stiffened in their descent, leaving low curved bulges to ascend or bypass. A distinct trail of rover tracks zigzagged up the slope, avoiding steep sections at the bottoms of these flows, taking advantage of a big loose network of ramps and flowbacks. In any permanent shade, spindrift had settled into banks of dirty hard-packed snow; shadows were now a filmy blackened white, as if she drove through a photographic negative, her spirits plummeting inexplicably as she drove ever higher. Behind her she could see more and more of the conical northern flank of the volcano, and north Tharsis beyond that, all the way to the Echus wall, a low line over a hundred kilometers away. Much of what she could see was patchy with snowdrifts, windslab, firn. Freckled white. The shady sides of volcanic cones often became heavily glaciated.

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There on a rockface, bright emerald moss. Everything was turning green.

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