_scientists - Sax Russell, Vlad Taneev, Marina Tokareva, Ursula Kohl, Ann
Clayborne - these and other dedicated scientists seemed to have the capacity
to spend great amounts of their time reading, working at their computers, and
talking. Presumably lives spent largely in labs had prepared them.
They also understood that this was the life Mars was waiting to give
them. Something not that different from the lives they had always led. So that
the best analogy to Mars, perhaps, was not Antarctica, but any intense
scientific laboratory.
This led him to thoughts of the optimum life history when considering
inclusion in the group: middle-aged lab scientist, dedicated, accomplished;
childless; unmarried or divorced. Lots of applicants fitted the criteria. In
some ways you had to wonder. Though it wouldn't be fair; it was a life pattern
with its own integrity, its own rewards. Michel himself fitted the bill in
every respect.
Naturally he had to divide his attention equally among all of the
candidates, and he did. But one day he got to accompany Tatiana Durova alone,
on a hike up the South Fork of Wright Valley. They hiked to the left of the
flat-topped island ridge called the Dais that divided the valley lengthways,
and continued up the southern arm of Wright Valley to Don Juan Pond.
Don Juan Pond: what a name for this extraterrestrial desolation! The
pond was so salty that it would not freeze until the air chilled to -54 C;
then the ice coating the shallow saline pond, having been distilled by the
freezing, would be fresh-water ice, and so would not thaw again until the
temperature rose above zero, usually in the following summer when trapped
sunlight would greenhouse in the water under the ice, and melt it from below.
As Tatiana explained the process it hovered in Michel's mind as some kind of
analogy to their own situation, hanging right on the edge of his understanding
but never coming clear.
'Anyway,' she was saying, 'scientists can use the pond as a single-
setting minimum-temperature thermometer. Come here in the spring and you know
immediately if the previous winter has got below minus 54.'
As it had already, some cold night this autumn; a layer of white ice
sheeted the pond. Michel stood with Tatiana on the whitish,
humped, salt-crusted shore. Over the Dais the noon sky was blueblack. Around
them the steep valley walls fell to the floor of the canyon. Large dark
boulders stuck out of the pond's ice sheet.
Tatiana walked out onto the white surface, plunging through it with
every step, boots crackling, water splashing - liquid salt water, spilling
over the fresh ice, dissolving it and sending up a thin frost smoke. A vision:
the Lady of the Lake, become corporeal and thus too heavy to walk on water.
But the pond was only a few centimetres deep, it barely covered the tops
of her thick boots. Tatiana reached down and touched the tip of one gloved
finger into the water, pulled up her mask to taste the water with her
impossibly beautiful mouth - which puckered to a tight square. Then she threw
back her head and laughed. 'My God! Come taste, Michel, but just a touch, I
warn you. It's terrible!'
And so he clomped through the ice and over the wet sand floor of the
pond, stepping awkwardly, a bull in a china shop.
'It's fifty times saltier than the sea, taste it.'
Michel reached down, put his forefinger in the water; the cold was
intense, it was amazing that it was liquid still, so cold it was. He raised it
to his tongue, touched gingerly: cold fire. It burned like acid. 'My God!' he
exclaimed, spitting out involuntarily. 'Is it poison?' Some toxic alkali, or a