Did you know

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   Americans use 50 million tons of paper annually -- consuming more than 850 million trees.

• 

   At 13.7 billion years old, the Universe is only three times older than the Earth itself.

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   An estimated 600 people per year in the US are struck by lightning. Only about 10% die as a result.

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   The human population of the world is expected to be nearly tripled by the year 2100.