The visit to the zoo was one of several, which continued until Lampert, Mitsuitei and the two paleontologists were able to identify each of a dozen animals which were most concerned in the death rate of Viridis. Apparently McLaughlin was not the only guide who did this. The zoo was equipped to give a "final examination" in which any creature the guide desired could be seen on a television screen from viewpoints quite different from those obtained in front of the cages. McLaughlin proved hard to satisfy.
Lampert did not blame him. He knew a lot about Viridis, of course. He had not only read of it in ordinary reference material, but had done much of the laboratory work on drill cores brought from the planet. His name had been one of those attached to the report giving the probable age of the planet's crust. At that time, however, the mental picture he held had been of continent distribution, rock strata, zones of diastrophic stress and the like. The question of the appearance, or even the existence, of plants, animals and people had simply never risen to conscious level in his mind.
That had changed, shortly before his arrival. The tramp spacer which had brought him and his group to Viridis had had to orbit about the world in free fall for several hours while its obsolete drive elements "cooled," and the passengers had examined the planet.
Lampert, oddly enough, had been as much impressed by the night side as by the sunlit hemisphere. The latter had shown, at twenty thousand kilometers, a fairly standard land and water pattern. The most unusual thing about it had been the almost perfect uniformity of the land coloration, a light green which bespoke, or at least implied, a virtually complete covering of vegetation.
By the time the ship had circled to the dark side, however, it was much closer to the surface; and Lampert would have expected to make out luminous sparks and patches of towns and cities by the hundreds.
He saw just two, and was not really sure of those. For the rest, the planet was a vast, gray-black circle occulting a portion of the Milky Way. It was not absolutely black, either. Its contrast with the background of the galaxy was diminished by the glow in the upper atmosphere arising from the recombination of water molecules dissociated during the day by Beta Librae's fierce ultraviolet light. The center of the circle was darker than the edges, where the line of sight penetrated through more of the luminous gas.
But even this sight, unusual as it was, did not affect Lampert as much as the lack of city lights. He had done field work in lonely, wild places before, of course; but until now he had always had the feeling of being in an island of wilderness more or less surrounded by civilization. On Viridis it was the civilized spots which formed the islands. And very small islands they were. There was no known native intelligent race, and settlements of alien races such as the men from Earth were still few and far between.
So Lampert was prepared for McLaughlin's care in readying the group for its trip. He was even glad of it, though he would probably not have admitted to being at all afraid of the venture. He would simply have said that it was nice to have a guide who took his responsibilities seriously.
That of course, did not mean that Lampert was intending to disavow any of his own responsibilities. He, like McLaughlin, had been keeping a careful eye on the other members of the group, looking for the signs of impatience or ill temper which could be the seeds of serious trouble if the journey were prolonged. He had come to tentative conclusions about this during the flight from Earth, but was pleased to see that, apparently, men who could stand the enforced companionship of a tramp spacer were also able to retain their senses of humor in the steam-bath environment of Viridis.