
induce biological changes. And mind and memory are very delicate things. So for people who are worried about that,
we make available a deluxe version. That's what you bought. Your wife will be stored at liquid helium temperatures, just
a few degrees above absolute zero. That's supersafe. When it's so cold, the chance of change—physical or
mental—goes way down."
And the cost, although she did not mention the fact, went way up. But cost was not even a variable to be considered
from Drake's perspective. When they arrived at the Second Chance facility he hung around the preparation room,
ignoring all hints that he should wait outside; and he watched closely.
The team members became more sympathetic. They were now convinced that he was simply terrified that a mistake
would be made. They allowed him to see everything and answered all his questions. He was careful not to ask
anything that sounded too clinical and dispassionate. The main thing he wanted was to see, to know at absolute
firsthand what had been done, and in what sequence.
After the first few minutes there was in any case not much to see. He knew that all the air cavities within Ana's body
had been filled with neutral solution, and her blood replaced with anticrystalloids. But then she went into the seamless
pressure chamber. The body was held there at three degrees above freezing, while the pressure was raised slowly to
five thousand atmospheres. After that was done, the temperature drop started.
"Back in the eighties and nineties, they had no idea of this technique." The team leader was still talking to Drake,
perhaps with the idea that she might make him feel more relaxed. "They used to do the freezing at atmospheric
pressure. There was a formation of ice crystals within the cells as the temperature dropped, and it was a mess when the
thaw was done. No return to consciousness was possible."
She smiled reassuringly at Drake, who was not reassured at all. So they didn't know what they were doing in the
eighties and nineties. Would they claim in twenty more years that people didn't know what they were doing now? But
he had no alternative. He couldn't wait for twenty years, or even twenty hours.
"The modern method is quite different," she went on. "We make use of the fact that ice can exist in many different
solid forms. Ice is complicated stuff, much more than most people realize. If you raise the pressure to three thousand
atmospheres, then drop the temperature, water will remain liquid to about minus twenty degrees Celsius. And when it
finally changes to a solid, it isn't the familiar form of ice—what is usually called phase 1. Instead it turns to something
called phase 3. Drop the temperature from there, holding the pressure constant, and at about minus twenty-five
degrees it changes to another form, phase 2. And it stays that way as you drop the temperature still farther. If you go
to five thousand atmospheres pressure—that's what we are doing here—before you drop the temperature, water
freezes at about minus five degrees and adopts still another form, phase 5. The trick to avoiding cell rupture problems
at freezing point is to inject anticrystalloids, which help to inhibit crystal formation, then by the right combination of
temperatures and pressures
work all the way down toward absolute zero, passing into and through phases 5, 3, and 2.
"That's what we are doing now. But don't expect to see much except dial readings. For obvious reasons, the pressure
chamber is made without seams and without observation ports. You don't get pressures of five thousand atmospheres,
not even in the deepest ocean gulfs. Fortunately, once you have the temperature down below a hundred absolute, you
can reduce the pressure to one atmosphere, otherwise the storage of revivables would be quite impracticable. As it is,
we have many thousands stacked away in the Second Chance wombs. Every one of them is neatly labeled and waiting
for the resurrection. That will come as soon as someone figures out a way to do the thaw."
She glanced at Drake, aware that her last comment might have been the wrong thing to say. The official position at
Second Chance was that everyone was revivable, and that the organization had full control of all the necessary
technology. In due course everyone would be revived.
Drake nodded without expression. He had researched the whole subject in detail, and nothing that she had said so far
was news. In his opinion it would be as hard to revive the early cryocorpses as it would be to get Tutankhamen's
mummy up and moving again. They had been frozen with the wrong procedure, and they were being stored at too high
a temperature.
But who was he to make that decision? They had paid their deposits, and they had the right to sit there in the wombs
until their rentals ran out. He had started Ana with a forty-year contract, but he thought of that as just the beginning.
He had brought with him a copy of Ana's medical records. He added to it a full description of everything he had seen
in the past hour or two, copied the whole document, and made sure that a complete set was included with the file
records on Ana. When Ana's body was finally taken away for storage he went back to the house, fell into bed, and
slept like a cryocorpse himself for sixteen hours.