Abstract

Have you ever given a passing glance to one of Bill Bell's "Lightsticks"? At the exit of the Exploratorium in San Francisco, there is a vertical line of light 21/2 meters high. Those who give it a passing glance usually stop and exclaim, "Aye", often causing their companions to ask why, until they are told to stop staring and give it a passing glance at 10 radians per second. Only then do they see a large red eye behind the Lightstick [1]. What relevance do the 10 essays in this book have to readers of Leonardo?

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