2. STRANGE MANKINDS
Though all the worlds which we entered in the first phase of our adventure were in the throes of the crisis known so well in our own world, some were occupied by races bio-logically similar to man, others by very different types. The more obviously human races inhabited planets of much the same size and nature as the Earth and the Other Earth. All, whatever the vagaries of their biological history, had finally been molded by circumstance to the erect form which is evidently most suited to such worlds. Nearly always the two nether limbs were used for locomotion, the two upper limbs for manipulation. Generally there was some sort of head, containing the brain and the organs of remote perception, and perhaps the orifices for eating and breathing. In size these quasi-human types were seldom larger than our largest gorillas, seldom much smaller than monkeys; but we could not estimate their size with any accuracy, as we had no familiar standards of measurements.
Within this approximately human class there was great variety. We came upon feathered, penguin-like men, descended from true fliers, and on some small planets we found bird-men who retained the power of flight, yet were able to carry an adequate human brain. Even on some large planets, with exceptionally buoyant atmosphere, men flew with their own wings. Then there were men that had developed from a slug-like ancestor along a line which was not vertebrate, still less mammalian. Men of this type attained the necessary rigidity and flexibility of limb by means of a delicate internal "basket-work" of wiry bones.
On one very small but earthlike planet we discovered a quasi-human race which was probably unique. Here, though life had evolved much as on earth, all the higher animals differed remarkably from the familiar type in one obvious respect. They were without that far-reaching duplication of organs which characterizes all our vertebrates. Thus a man in this world was rather like half a terrestrial man. He hopped on one sturdy, splay-footed leg, balancing himself with a kangaroo tail. A single arm protruded from his chest, but branched into three forearms and prehensile fingers. Above his mouth was a single nostril, above that an ear, and on the top of his head a flexible three-pronged proboscis bearing three eyes.
A very different and fairly common quasi-human kind was sometimes produced by planets rather larger than the Earth. Owing to the greater strength of gravitation, there would first appear, in place of the familiar quadruped, a six-legged type. This would proliferate into little sextuped burrowers, swift and elegant sextuped grazers, a sextuped mammoth, complete with tusks, and many kinds of sextuped carnivora. Man in these worlds sprang usually from some small opposum-like creature which had come to use the first of its three pairs of limbs for nest-building or for climbing. In time, the forepart of its body thus became erect, and it gradually assumed a form not unlike that of a quadruped with a human torso in place of a neck. In fact it became a centaur, with four legs and two capable arms. It was very strange to find oneself in a world in which all the amenities and conveniences of civilization were fashioned to suit men of this form.
In one of these worlds, rather smaller than the rest; man was not a centaur, though centaurs were among his remote ancestors. In sub-human stages of evolution the pressure of the environment had telescoped the horizontal part of the centaur's body, so that the forelegs and the hind-legs were drawn closer and closer together, till at last they became a single sturdy pair. Thus man and his nearer ancestors were bipeds with very large rumps, reminiscent of the Victorian bustle, and legs whose internal structure still showed their "centaur" origin.
One very common kind of quasi-human world I must describe in more detail, as it plays an important part in the history of our galaxy. In these worlds man, though varying greatly in form and fortune in particular worlds, had in every case developed from a sort of five-pronged marine animal, rather like a star-fish. This creature would in time specialize one prong for perceiving, four for locomotion. Later it would develop lungs, a complex digestive apparatus, and a well-integrated nervous system. Later still the perceiving limb would produce a brain, the others becoming adapted for running and climbing. The soft spines which covered the body of the ancestral star-fish often developed into a kind of spiky fur. In due season there would arise an erect, intelligent biped, equipped with eyes, nostrils, ears, taste-organs, and sometimes organs of electric perception. Save for the grotesqueness of their faces, and the fact that the mouth was generally upon the belly, these creatures were remarkably human. Their bodies, however, were usually covered with the soft spines or fat hairs characteristic of these worlds. Clothes were unknown, save as protection against cold in the arctic regions. Their faces, of course, were apt to be far from human. The tall head often bore a coronet of five eyes. Large single nostrils, used for breathing and smelling and also speaking, formed another circlet below the eyes.
The appearance of these "Human Echinoderms" belied their nature, for though their faces were inhuman, the basic pattern of their minds was not unlike our own. Their senses were much like ours, save that in some worlds they developed a far more varied color-sensitivity. Those races that had the electric sense gave us some difficulty; for, in order to understand their thought, we had to learn a whole new gamut of sense qualities and a vast system of unfamiliar symbolism. The electric organs detected very slight differences of electric charge in relation to the subject's own body. Originally this sense had been used for revealing enemies equipped with electric organs of offense. But in man its significance was chiefly social. It gave information about the emotional state of one's neighbors. Beyond this its function was meteorological.
One example of this kind of world, one which clearly illustrates the type, and at the same time presents interesting peculiarities must be described in more detail.
The key to the understanding of this race is, I believe, its strange method of reproduction, which was essentially communal. Every individual was capable of budding a new individual; but only at certain seasons, and only after stimulation by a kind of pollen emanating from the whole tribe and carried on the air. The grains of this ultra-microscopically fine pollen dust were not germ cells but "genes," the elementary factors of inheritance. The precincts of the tribe were at all times faintly perfumed by the communal pollen; but on occasions of violent group emotion the pollen cloud became so intensified as to be actually visible as a haze. Only on these rare occasions was conception probable. Breathed out by every individual, the pollen was breathed in by those who were ripe for fertilization. By all it was experienced as a rich and subtle perfume, to which each individual contributed his peculiar odor. By means of a curious psychical and physiological mechanism the individual in heat was moved to crave stimulation by the full perfume of the tribe, or of the great majority of its members; and indeed, if the pollen clouds were insufficiently complex, conception would not occur. Cross-fertilization between tribes happened in inter-tribal warfare and in the ceaseless coming and going between tribes in the modern world.