Philosophy of science and nature

If the Earth floats on water, what does the water float on?

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Thales of Miletus

The floating Earth

Aristotle reports that Thales thought the Earth rests on water and stays still because it floats, like wood; and he criticizes the idea.

ancient testimony · Aristóteles, Metaphysics 1.3 983b20

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Philosophy of science and nature · cosmology

What is claimed and why

  1. According to Aristotle, Thales held, as a consequence of his view on water, that the Earth rests on water and stays still because it floats, like wood. Aristotle objects that the same account would be needed for the water that carries the Earth. ancient testimony
    Aristóteles, Metaphysics (tr. Hugh Tredennick) — 1.3 983b20
    which is why he also propounded that the earth floats on water
    Aristóteles, Metaphysics (tr. Patricio de Azcárate) — I.3 983b
    Por esto llega hasta pretender, que la tierra descansa en el agua
    Aristóteles, On the Heavens (De caelo) (tr. J. L. Stocks) — 2.13; 2.13
    Others say the earth rests upon water. This, indeed, is the oldest theory that has been preserved, and is attributed to Thales of Miletus. It was supposed to stay still because it floated like wood and other similar substances
    As if the same account had not to be given of the water which carries the earth as of the earth itself!
    Patricia O'Grady, Thales of Miletus (Internet Encyclopedia of Philosophy) — §6a · consulted; copyrighted text, not reproduced

Profile: Thales of Miletus

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According to Aristotle, what kept the Earth still for Thales?

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