Used for water distribution, the Delaware Aqueduct in New York, USA is the longest tunnel in the world (as of 2010). Drilled through solid rock, it reaches a staggering 137 kilometres (85 miles) in length. More tunnel facts.

Author Dr. Seuss wrote the book "Green Eggs and Ham" because the editor made him a bet that he could not write a book, which contained less than fifty words.

Bill Gates' first business was Traff-O-Data, a company that created machines which recorded the number of cars passing a given point on a road.

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