49:2.1 (560.7) There is a standard and basic pattern of vegetable and animal life in each system. But the Life Carriers are oftentimes confronted with the necessity of modifying these basic patterns to conform to the varying physical conditions which confront them on numerous worlds of space. They foster a generalized system type of mortal creature, but there are seven distinct physical types as well as thousands upon thousands of minor variants of these seven outstanding differentiations:
49:2.2 (561.1) 1. Atmospheric types.
49:2.3 (561.2) 2. Elemental types.
49:2.4 (561.3) 3. Gravity types.
49:2.5 (561.4) 4. Temperature types.
49:2.6 (561.5) 5. Electric types.
49:2.7 (561.6) 6. Energizing types.
49:2.8 (561.7) 7. Unnamed types.
49:2.9 (561.8) The Satania system contains all of these types and numerous intermediate groups, although some are very sparingly represented.
49:2.10 (561.9) 1.
49:2.11 (561.10) The present atmospheric status of Urantia is almost ideal for the support of the breathing type of man, but the human type can be so modified that it can live on both the superatmospheric and the subatmospheric planets. Such modifications also extend to the animal life, which differs greatly on the various inhabited spheres. There is a very great modification of animal orders on both the sub- and the superatmospheric worlds.
49:2.12 (561.11) Of the atmospheric types in Satania, about two and one-half per cent are subbreathers, about five per cent superbreathers, and over ninety-one per cent are mid-breathers, altogether accounting for ninety-eight and one-half per cent of the Satania worlds.
49:2.13 (561.12) Beings such as the Urantia races are classified as mid-breathers; you represent the average or typical breathing order of mortal existence. If intelligent creatures should exist on a planet with an atmosphere similar to that of your near neighbor, Venus, they would belong to the superbreather group, while those inhabiting a planet with an atmosphere as thin as that of your outer neighbor, Mars, would be denominated subbreathers.
49:2.14 (561.13) If mortals should inhabit a planet devoid of air, like your moon, they would belong to the separate order of nonbreathers. This type represents a radical or extreme adjustment to the planetary environment and is separately considered. Nonbreathers account for the remaining one and one-half per cent of Satania worlds.
49:2.15 (561.14) 2.
49:2.16 (561.15) It is quite impossible for you to envisage the environment which prevails during the early ages of some worlds. These unusual conditions make it necessary for the evolving animal life to remain in its marine nursery habitat for longer periods than on those planets which very early provide a hospitable land-and-atmosphere environment. Conversely, on some worlds of the superbreathers, when the planet is not too large, it is sometimes expedient to provide for a mortal type which can readily negotiate atmospheric passage. These air navigators sometimes intervene between the water and land groups, and they always live in a measure upon the ground, eventually evolving into land dwellers. But on some worlds, for ages they continue to fly even after they have become land-type beings.
49:2.17 (562.1) It is both amazing and amusing to observe the early civilization of a primitive race of human beings taking shape, in one case, in the air and treetops and, in another, midst the shallow waters of sheltered tropic basins, as well as on the bottom, sides, and shores of these marine gardens of the dawn races of such extraordinary spheres. Even on Urantia there was a long age during which primitive man preserved himself and advanced his primitive civilization by living for the most part in the treetops as did his earlier arboreal ancestors. And on Urantia you still have a group of diminutive mammals (the bat family) that are air navigators, and your seals and whales, of marine habitat, are also of the mammalian order.
49:2.18 (562.2) In Satania, of the elemental types, seven per cent are water, ten per cent air, seventy per cent land, and thirteen per cent combined land-and-air types. But these modifications of early intelligent creatures are neither human fishes nor human birds. They are of the human and prehuman types, neither superfishes nor glorified birds but distinctly mortal.
