For a moment no one spoke; each wanted to savor this moment in silence. The three of them, as was usually the case on such expeditions, were all members of the same mating group, so neither their bodies nor their minds held any secrets from each other. This was their fifth landing together, and silence united them more closely than any words.
At last, Clindar touched the control panel, and into the cabin came the sounds of the new world. For a long time they listened to the voices of the forest, to the sighing of the wind through the strange trees and grasses, to the cries of animals killing or being killed-and a changeless background of muted thunder, the roar of the great waterfall two miles away. One day they would know every thread in this tapestry of sound; but now it was full of menace, and woke forgotten fears. For all their wisdom and sophistication, they felt like children facing the unknown terrors of the night; and their hearts ached for home.
The familiar routines of the landing procedure soon turned them back into calm, professional explorer scientists. First the little collection robots were sent rolling in all directions, to gather leaves and grasses and, with luck, any small animals slow-moving enough to be caught. All the samples they brought back were examined in the scoutship's sealed and automatic lab, so that there was no danger of contamination. The biochemical patterns were swiftly evaluated-it was rare to find a wholly novel one, especially on an oxygen-carbon world like this-and the information flashed up to the hovering mother ship, twenty thousand miles away. There seemed to be no virulently hostile microorganisms here, but life was of such infinite complexity that one could never be sure. Planets could produce deadly surprises, generations after they had been declared completely safe.
No large animals came near the ship during the hours of daylight which was not surprising, for it stood in several acres of open ground where the only cover was a few low bushes. But at dusk, the picture changed, and the land became alive as the shadows lengthened and deepened into night.
To the watchers on the ship, darkness was no handicap. Through the infrared periscope they could see the world around them as if it were still daylight; they could follow the shy herbivores on their way to the waterholes, and could study the tactics of the great predators who hunted them. There were still tigers in this land, with twin sabers jutting from their jaws; but in another million years they would be gone, and Africa would belong to the lion.
It was slow, sometimes exasperating, but always fascinating work-making a census of a world one could not touch. Several times Clindar moved the ship a few miles to change the vantagepoint, and to make sure that the animals and plants formed a representative sample. And in the second week, they found the hominids. It was the din through the long-distance microphones that drew attention to them. As Clindar swung the periscope in the direction of the uproar, he found that his view of the disturbance was partly blocked by trees, but he could see enough to make it unnecessary to move the ship.
About half a mile away, in a small clearing near the bank of an almost dried-up river, a leopard had made a kill. It was crouched over some unfortunate victim who had presumably been drinking at the water's edge, and was snarling angrily at a hostile chorus from the surrounding trees. There were dark, shadow animals of fair size moving through the branches of those trees, and it was some time before Clindar could get a good view of one. But suddenly, as he tracked through the foliage, he came upon a clear line of sight-and looked straight into a hairy caricature of his own face.
The creature was screaming with rage as it danced up and down on the tree limb, directing its fury at the leopard. On other branches, its companions were doing the same, and though they could not harm the killer they were obviously annoying it, for presently the big cat started to move away, dragging the bloody carcass of its victim by the leg. As the body rolled over, Clindar found himself once again looking into the distorting mirror of time.
He had seen the reconstructions of his own ancestors, five or ten million years ago; the mask now stiffening into a grimace of death might have belonged to any one of them. There was the same low, ridged forehead, close- set eyes, muscular but chinless jaw, protruding teeth. It was not the first time he had met this pattern, for variations of it were common on many worlds, yet it always filled him with wonder, and with a sense of kinship that spanned the evolutionary gulfs.
The leopard and its victim vanished from view; the chorus of fear and anger died away. Clindar watched, and waited.
Slowly and cautiously, the hominids came down from the trees, in which they did not seem to be completely at home. They walked on all fours, but from time to time reared up on their hind limbs and took several steps in an upright position. Abruptly, as if they had spotted the leopard again, they all fled in panic, away from the river and the trees. As they ran, they became true bipeds, covering considerable distances without their forelimbs touching the ground.
Clindar followed them with some difficulty, and at first thought he had lost them. Then he spotted their brown figures swarming up the almost vertical face of a sandstone cliff, heading for a cave some fifty feet from the ground. It was a well-chosen refuge, for the entrance was too high to be reached by the great cats. Such a choice of dwelling place might be instinctive, but it might also indicate the dawn of intelligence. These creatures, Clindar told himself with mounting excitement, would certainly merit watching.
Through long but fascinating hours at the periscope, he grew to know them all, and to learn the pattern of their behavior. There were only ten of them-four males, three females, three infants-and physically they were unimpressive specimens, living always on the edge of hunger. Most of their food was obtained by foraging among grasses and shrubs, but they were not exclusively vegetarian. They ate meat whenever they could get it, which was seldom, for they were inefficient hunters. About the only animals that fell prey to them were tortoises, small rodents, and occasional fish that they could catch in the shallows of the river.
Because they did not possess the simplest tools, they could not even take proper advantage of such rare and accidental windfalls as a mired elephant, or an antelope that had broken its leg. The meat would rot before they could tear it all out with their teeth; and they could not fight off the big carnivores that would be attracted to such a feast.
It was a wonder that they had survived, and their future did not look promising. Clindar was not in the least surprised when one of the infants died, apparently of starvation, and the little body was thrown out of the cave for the hyenas to carry away. These creatures had not yet learned the useful accomplishment of burying their dead, lest they lead wild animals to the living.
But Clindar, with the experience of many worlds behind him, knew that appearances could be deceptive. These unprepossessing near-apes had one great advantage over all the other creatures of their planet. They were still unspecialized; they had not yet become trapped in any evolutionary cul-de-sac. Almost every animal could beat them in some respect-in strength, or speed, or hearing, or natural armament. There was no single skill in which the hominids excelled, but they could do everything after a fashion. Where the other animals had become virtuosos, they had specialized in a universal mediocrity-and therein, a million years hence, might lie their salvation. Having failed to adapt themselves to their environment, they might yet one day change it to suit their own desires.
Other humanoid races, times without number, had taken a different road. Clindar had seen, either with his own eyes or through the records of other explorers, those who had chosen to specialize-though the choice, of course, was never a conscious one. He had seen near-men who could run like the wind, swim like fish, hunt in the dark with sonar or infrared senses; on one world of exceptionally low gravity he had even encountered men who could fly. Most of these specialists had been extremely successful; so successful that they had had no need to develop more than a rudimentary intelligence.
And therefore they were doomed, though they might flourish for a million years. Sooner or later, the environment to which they were so perfectly adapted would change, and they could not change with it. They were too far from the crucial fork in the evolutionary road ever to retrace their steps.
On this world, the choice remained; the irrevocable decision between brain and body had not yet been made. The future was still in the balance. Here, on this tropical plain, the balance might be tipped-in favor of intelligence.
MOON-WATCHER
It was surprising how quickly all the animals grew accustomed to the ship; because it did nothing, and merely stood motionless on its tripod of legs, they soon came to regard it as part of the landscape. In the heat of noon,
