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.

Benjamin Franklin was offended about putting a bald eagle as the national bird because he thought that other people were trying to make fun of him, since he was bald.

Worldwide, there are approximately 100 million acts of sexual intercourse each day.

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