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  • How America celebrates Pi Dayadd to reading list  

    Posted on March 14, 2014 at 5:14 AM

    Updated Friday, Mar 14 at 7:09 AM

    Across the country, math geeks in museums, schools, private groups and elsewhere gather to celebrate the number pi, approximately 3.14. That’s why March 14 -- 3-14 -- is Pi Day. What’s more, Albert Einstein was born on this day.

    By Elizabeth Landau, CNN
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