HOW you ever wondered about how things work? About how things happen? How does pulling a chain stop a mighty locomotive? How do birds migrate over vast distances without any apparent navigational aids? How are unmanned spacecrafts controlled? How is human IQ measured? Finding answers to such questions can, at times, be a real brain teaser. But no more. Here, are answers to one hundred such questions, in this profusely illustrated book written in a language anyone can understand.
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