How many experiences do we miss -- either through inattention or our own limitations -- when walking through the woods or diving with scuba mask and flippers? All around us, animals communicate and perceive with senses quite different from our own that have evolved from particular needs. Just as humans have employed technology to overcome limitations of physical strength, dexterity, and distance, so can we imagine technologies that enable us to extend our senses by taking cues from birds, whales, and other animals.
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