Science2 - 00087

Science2 - 00087 - Untitled opening up the earth with their...

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Untitled opening up the earth with their burrows, circulating the soil by means of their castings, and bruising the particles in their gizzard--certainly the most important mill in the world. Another important idea is that littoral haunts, both on the seashore and in the freshwaters, afforded the necessary apprenticeship and transitional experience for the more strenuous life on dry land. Much that was perfected on land had its beginnings on the shore. Let us inquire, however, what the passage from water to dry land actually implied. This has been briefly discussed in a previous article (on Evolution), but the subject is one of great interest and importance. Difficulties and Results of the Transition from Water to Land Leaving the water for dry land implied a loss in freedom of movement, for the terrestrial animal is primarily restricted to the surface of the earth. Thus it became essential that movements should be very rapid and very precise, needs with which we may associate the acquisition of fine
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