Carl Sagan quote: Natural selection has served as a kind of intellectual sieve, producing brains and intelligences increasingly competent to deal with the ...

Natural selection has served as a kind of intellectual sieve, producing brains and intelligences increasingly competent to deal with the laws of nature.

~ Carl Sagan ~

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Natural selection has served as a kind of intellectual sieve, producing brains and intelligences inc...

Picture of Carl Sagan — Carl SaganDragons of Eden: Speculations on the Evolution of Human Intelligence

More Carl Sagan quotes

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Perhaps the locale of the subjunctive mood willone day be found. Will Latins turn out to be extravagantly endowed and English-speaking peoples signifi...

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The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.

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The entire evolutionary record on our planet, particularly the record contained in fossil endocasts, illustrates a progressive tendency toward intelli...

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The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

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How thoroughly the chimps and bonobos have erased the list of purported human distinctions!-self-awareness, language, ideas and their association, rea...

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Both [P. T.] Barnum and H. L. Mencken are said to have made the depressing observation that no one ever lost money by underestimating the intelligence...

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Perhaps if one less dragonfly had drowned in the Carboniferous swamps, the intelligent organisms on our planet today would have feathers and teach the...

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Civilization is a product of the cerebral cortex.

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The fossil record implies trial and error, the inability to anticipate the future, features inconsistent with a Great Designer (though not a Designer ...

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The secrets of evolution, are time and death. There's an unbroken thread that stretches from those first cells to us.

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Pliny suggested that the ostrich, then newly discovered, was the result of a cross between a giraffe and a gnat. (It would, I suppose, have to be a fe...

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Lashley also reported no apparent change in the general behavior of a rat when significant fractions—say 10 percent—of its brain were removed. But no ...

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So far as I know, childbirth is generally painful in only one of the millions of species on Earth: human beings. This must be a consequence of the rec...

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It may be that there are kernels of truth in a few of these doctrines, but their widespread acceptancebetokens a lack of intellectual rigor, an absenc...

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Much more plausible is the computer-based explanation that dreams are a spillover from the unconscious processing of the day's experience, from the br...