24 DEC 2013 by ideonexus


In 1909, the biologist Jakob von Uexküll introduced the concept of the umwelt. He wanted a word to express a simple (but often overlooked) observation: Different animals in the same ecosystem pick up on different environmental signals. In the blind and deaf world of the tick, the important signals are temperature and the odor of butyric acid. For the black ghost knifefish, it’s electrical fields. For the echolocating bat, it’s air-compression waves. The small subset of the world that an ...
Folksonomies: perception senses
Folksonomies: perception senses
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David Eagleman on how each species of animal senses only a small portion of the world, and assumes that small fraction is the entire world.