Every river in the world was running sludgy with mud to its mouth, as the last of the trees and grasses died and relaxed their grip on the soil. Every rain washed dirt away. As the winter dark deepened the rains turned to snow. The Flaming Mountains were sheeted in ice now, ghostly, glassy fingers uplifted to the gloom. Men could walk across the Thames at London now, the few men who were left. And across the Hudson, across the Whangpoo, across the Missouri between the two Kansas Cities. Avalanches rumbled down on what was left of Denver. In the stands of dead timber grubs flourished. The starved predators scratched them out and devoured them. Some of the predators were human. The last of the Hawaiians were finally grateful for their termites.
A Western human being—comfortably pudgy on a diet of 2800 calories a day, resolutely jogging to keep the flab away or mournfully conscience-stricken at the thickening thighs and the waistbands that won't quite close—can survive for forty-five days without food. By then the fat is gone. Protein reabsorption of the muscles is well along. The plump housewife or businessman is a starving scarecrow. Still, even then care and nursing can still restore health.
Then it gets worse.
Dissolution attacks the nervous system. Blindness begins. The flesh of the gums recedes, and the teeth fall out. Apathy becomes pain, then agony, then coma.
Then death. Death for almost every person on Earth…
For forty days and forty nights the rain fell, and so did the temperature. Iceland froze over.
To Harry Malibert's astonishment and dawning relief, Iceland was well equipped to do that. It was one of the few places on Earth that could be submerged in snow and ice and still survive.
There is a ridge of volcanoes that goes almost around the Earth. The part that lies between America and Europe is called the Mid-Atlantic Ridge, and most of it is under water. Here and there, like boils erupting along a forearm, volcanic islands poke up above the surface. Iceland is one of them. It was because Iceland was volcanic that it could survive when most places died of freezing, but it was also because it had been cold in the first place.
The survival authorities put Malibert to work as soon as they found out who he was. There was no job opening for a radio astronomer interested in contacting far-off (and very likely non-existent) alien races. There was, however, plenty of work for persons with scientific training, especially if they had the engineering skills of a man who had run Arecibo for two years. When Malibert was not nursing Timothy Clary through the slow and silent convalescence from his pneumonia, he was calculating heat losses and pumping rates for the piped geothermal water.
Iceland filled itself with enclosed space. It heated the spaces with water from the boiling underground springs.
Of heat it had plenty. Getting the heat from the geyser fields to the enclosed spaces was harder. The hot water was as hot as ever, since it did not depend at all on sunlight for its calories, but it took a lot more of it to keep out a −30°C chill than a +5°C one. It wasn't just to keep the surviving people warm that they needed energy. It was to grow food.
Iceland had always had a lot of geothermal greenhouses. The flowering ornamentals were ripped out and food plants put in their place. There was no sunlight to make the vegetables and grains grow, so the geothermal power-generating plants were put on max output. Solar-spectrum incandescents flooded the trays with photons. Not just in the old greenhouses. Gymnasia, churches, schools—they all began to grow food under the glaring lights. There was other food, too, metric tons of protein baaing and starving in the hills. The herds of sheep were captured and slaughtered and dressed—and put outside again, to freeze until needed. The animals that froze to death on the slopes were bulldozed into heaps of a hundred, and left where they were. Geodetic maps were carefully marked to show the location of each heap.
It was, after all, a blessing that Reykjavik had been nuked. That meant half a million fewer people for the island's resources to feed.
When Malibert was not calculating load factors, he was out in the desperate cold, urging on the workers. Sweating navvies tried to muscle shrunken fittings together in icy foxholes that their body heat kept filling with icewater. They listened patiently as Malibert tried to give orders—his few words of Icelandic were almost useless, but even the navvies sometimes spoke tourist-English. They checked their radiation monitors, looked up at the storms overhead, returned to their work and prayed. Even Malibert almost prayed when one day, trying to locate the course of the buried coastal road, he looked out on the sea ice and saw a gray-white ice hummock that was not an ice hummock. It was just at the limits of visibility, dim on the fringe of the road crew's work lights, and it moved. "A polar bear!" he whispered to the head of the work crew, and everyone stopped while the beast shambled out of sight.
From then on they carried rifles.
When Malibert was not (incompetent) technical advisor to the task of keeping Iceland warm or (almost incompetent, but learning) substitute father to Timothy Clary, he was trying desperately to calculate survival chances. Not just for them; for the entire human race. With all the desperate flurry of survival work, the Icelanders spared time to think of the future. A study team was created, physicists from the University of Reykjavik, the surviving Supply officer from the Keflavik airbase, a meteorologist on work-study from the University of Leyden to learn about North Atlantic air masses. They met in the gasthuis where Malibert lived with the boy, and usually Timmy sat silent next to Malibert while they talked. What they wanted was to know how long the dust cloud would persist. Some day the particles would finish dropping from the sky, and then the world could be reborn—if enough survived to parent a new race, anyway. But when? They could not tell. They did not know how long, how cold, how killing the nuclear winter would be. "We don't know the mega-tonnage," said Malibert, "we don't know what atmospheric changes have taken place, we don't know the rate of insolation. We only know it will be bad."
"It is already bad," grumbled Thorsid Magnesson, Director of Public Safety. (Once that office had had something to do with catching criminals, when the major threat to safety was crime.)
"It will get worse," said Malibert, and it did. The cold deepened. The reports from the rest of the world dwindled. They plotted maps to show what they knew to show. One set of missile maps, to show where the strikes had been—within a week that no longer mattered, because the deaths from cold already began to outweigh those from blast. They plotted isotherm maps, based on the scattered weather reports that came in—maps that had to be changed every day, as the freezing line marched toward the Equator. Finally the maps were irrelevant. The whole world was cold then. They plotted fatality maps—the percentages of deaths in each area, as they could infer them from the reports they received, but those maps soon became too frightening to plot.
The British Isles died first, not because they were nuked but because they were not. There were too many people alive there. Britain never owned more than a four-day supply of food. When the ships stopped coming they starved. So did Japan. A little later, so did Bermuda and Hawaii and Canada's off-shore provinces; and then it was the continents' turn.
And Timmy Clary listened to every word.
The boy didn't talk much. He never asked after his parents, not after the first few days. He did not hope for good news, and did not want bad. The boy's infection was cured, but the boy himself was not. He ate half of what a hungry child should devour. He ate that only when Malibert coaxed him.
The only thing that made Timmy look alive was the rare times when Malibert could talk to him about space. There were many in Iceland who knew about Harry Malibert and SETI, and a few who cared about it almost as much as Malibert himself. When time permitted they would get together, Malibert and his groupies. There was Lars the postman (now pick-and-shovel ice excavator, since there was no mail), Ingar the waitress from the Loftleider Hotel (now stitching heavy drapes to help insulate dwelling walls), Elda the English teacher (now practical nurse, frostbite cases a specialty). There were others, but those three were always there when they could get away. They were Harry Malibert fans who had read his books and dreamed with him of radio messages from weird aliens from Aldebaran, or worldships that could carry million-person populations across the galaxy, on voyages of a hundred thousand years. Timmy listened, and drew sketches of the worldships. Malibert supplied him with dimensions. "I talked to Gerry Webb," he said, "and he'd worked it out in detail. It is a matter of rotation rates and strength of materials. To provide the proper simulated gravity for the people in the ships, the shape has to be a cylinder and it has to spin—sixteen kilometers is what the diameter must be. Then the cylinder must be long enough to provide space, but not so long that the dynamics of spin cause it to wobble or bend—perhaps sixty kilometers long. One part to live in. One part to store fuel. And at the end, a reaction chamber where hydrogen fusion thrusts the ship across the Galaxy."