This new approach to knowledge works quickly and impressively. Within a matter of a few years, Anaximander understands that Earth floats in the sky and the sky continues beneath Earth; that rainwater comes from the evaporation of water on Earth; that the variety of substances in the world must be susceptible to being understood in terms of a single, unitary, and simple constituent, which he calls apeiron, the indistinct; that animals and plants evolve and adapt to changes in the environment, and that man must have evolved from other animals. Thus gradually founding the basis of a grammar for
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