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A mostrar mensagens de Abril, 2013

Imprinting

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Indigo Buntings Learn to Identify North from the Night Sky

"Consider the mechanism through which indigo buntings (a species of migratory songbird) learn to identify north from the night sky. In today’s night sky, Polaris is the North Star, the star in the region of the sky that reliably indicates north. Because the stars change position over time, Polaris will not always indicate true north, nor will true north in the future be predictable from the constellations of today, for the constellations themselves migrate and change over evolutionary time. Indeed, 100,000 years ago there was no Big Dipper, no Orion. Thus, evolution probably could not have built a map of the sky in the brain of the indigo buntings on which Polaris is identified as north, yet indigo buntings have such a map. Presented with a stationary simulacrum of the night sky in a planetarium in autumn, they take off as if to fly south as specified by the North Star, no matter how the planetarium’s night sky has been oriented with respect to true north in the actual world. In…

Quantum levitation

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Water Can't Be Free

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Metaphysics as ontology

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Blank city

Telejornal - última hora (25 de Abril 1974)

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Deep brain stimulation

Ó Rosa arredonda a saia

Veinte poemas de amor y una canción desesperada

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The tax free tour

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Tisvilde

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Harald Høffding

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The transparent brain

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I'm shocked.

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The brain

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The origin of concepts

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Together

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The slow fix

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The catholic church - a short history

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Does God play dice?

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Pal-V

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Iannis Xenakis - Metastasis

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Groovy shit

Rough anties

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El secreto de sus ojos

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