Up until this book, virtually all of my research was done by writing or phoning experts. Hyenas marked the first time I used cyberspace for serious research. What fun to talk to guitarists ("Why do many guitar players leave a long bit of string hanging off in the air at the tuning end of the guitar?"), architects ("Why do buildings have ledges?"), physicists ("Why do two cereal flakes that are floating in milk tend to float toward each other once they get less than an inch apart?"), and conductors ("In marching bands, why are woodwinds placed behind the brass when they are likely to be drowned out by the louder brass?").