Download e-book for iPad: How It Ends: From You to the Universe by Chris Impey

By Chris Impey

So much folks are conscious of our personal mortality, yet few between us comprehend what technology, with insights yielded from groundbreaking new examine, has to assert approximately endings on a bigger scale. input astronomer Chris Impey, who chronicles the dying of the full shebang: person, species, bio- sphere, Earth, sunlight, Milky approach, and, eventually, the complete universe.

With a hearty dose of humor, How It Ends illuminates every thing from the applied sciences of human existence extension and the evolutionary hands race among microbes and males to the inescapable dimming of the solar and the last word “big rip,” giving us a unprecedented glimpse right into a universe with out us.

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I answer that none of the conditions by which Aristotle distinguishes celestial from elemental bodies has any other foundation than what he deduces from the difference in natural motion between the former and the latter. In that case, if it is denied that circular motion is peculiar to celestial bodies, and affirmed to belong to all naturally movable bodies, then one must choose one of two necessary consequences. Either the at­ tributes of generable-ingenerable, alterable-inalterable, divisibleindivisible, etc.

Now as to the present question: You say that if one denies Aristotle’s statement that circular motion does not belong to the earth as it does to celestial bodies, then it follows that what­ The ever is true of the earth as to its being generable, alterable, and 41 so forth, is true also of the heavens. Let us then inquire no further First whether or not such things as generation and corruption exist in nature, but turn to investigating what the terrestrial globe actu­ Day ally does. Simp . I cannot accustom my ears to hearing it questioned whether generation and corruption exist in nature, this being a thing which is continually before our eyes, and one about which Aristotle has written two whole books.

With your first argument, you bring back to the table what has been standing there all day and has just now been carried away. Simp . Softly, sir; hear the rest, and you will see how different it is from that. Formerly the minor premise was proved a priori, and now I wish to prove it a posteriori. See for yourself whether this is the same thing. I shall prove the minor, because the major is obvious. , and therefore different from the heavens. The second argument I take from a principal and essential property, which is this: whatever body is naturally dark and de­ void of light is different from luminous and resplendent bodies; the earth is dark and without light, and celestial bodies are splen­ did and full of light; therefore, etc.

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