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Animal-intelligence Quotes

Human spoken language seems to beadventitious. The exploitation of organ systems with other function...

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

Why are there no nonhuman primates with an existing complex gestural language? One possible answer, ...

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

I would expect a significant development and elaboration of language in only a few generations if al...

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

Our difficulties in understanding or effectuatingcommunication with other animals may arise from our...

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

In addition to Ameslan, chimpanzees and other nonhuman primates are being taught a variety of other ...

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

Having escaped the Dark Ages in which animals were mere stimulus-response machines, we are free to c...

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Picture of Frans de Waal
Frans de WaalAre We Smart Enough to Know How Smart Animals Are?