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By Mara, Wil[2013], Juvenile, Cherry Lake Publishing Call No: 625.2 3 Availability:1 of 1 At Location(s) Series Title: Innovations from natureSummary Note: Can biology teach us how to improve rail travel? In their earlier stages, Japanese "bullet trains'" electrical contacts were too noisy, and the trains produced sonic booms when they went through tunnels. To solve the problem, engineer Eiji Nakatsu turned to a surprising source of inspiration: birds!