Relax with a book! Check out these new NIH Library eBook titles for Stress Awareness Month. Did you know you can access more than 24,000 eBooks through the NIH Library? Search our entire eBook collection.
The Greek letter π is the symbol for the irrational number representing the ratio of the circumference of a circle to its diameter. It is approximately 3.1415926. Pi Day is an annual celebration on March 14th (3/14), with this year’s being a very special Pi Day (3/14/15).