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Does Anything Eat Wasps? and 101 Other Questions: Questions and answers from the popular 'Last Word' column by New Scientist is a collection of the best that have appeared, including: Why can't we eat green potatoes? Why do airliners suddenly plummet? Does a compass work in space? Why do all the local dogs howl at emergency sirens? How can a tree grow out of a chimney stack? Why do bruises go through a range of colours? Why is the sea blue inside caves? Many seemingly simple questions are actually very complex to answer. And some that seem difficult have a very simple explanation.