By: Jeff Inglis, The Conversation
Editor’s note: The following is a roundup of archival stories. ![]()
On March 14, or 3/14, mathematicians and other obscure-holiday aficionados celebrate Pi Day, honoring π, the Greek symbol representing an irrational number that begins with 3.14. Pi, as schoolteachers everywhere repeat, represents the ratio of a circle’s circumference to its diameter.
What is Pi Day, and what, really, do we know about π anyway? Here are three-and-bit-more articles to round out your Pi Day festivities.
A silly holiday
First off, a reflection on this “holiday” construct. Pi itself is very important, writes mathematics professor Daniel Ullman of George Washington University, but celebrating it is absurd:
The Gregorian calendar, the decimal system, the Greek alphabet, and pies are relatively modern, human-made inventions, chosen arbitrarily among many equivalent choices. Of course a mood-boosting piece of lemon meringue could be just what many math lovers need in the middle of March at the end of a long winter. But there’s an element of absurdity to celebrating π by noting its connections with these ephemera, which have themselves no connection to π at all, just as absurd as it would be to celebrate Earth Day by eating foods that start with the letter “E.”
And yet, here we are, looking at the calendar and getting goofily giddy about the sequence of numbers it shows us.



ECS is committed to open access through
ECS isn’t the only one celebrating an anniversary this year. As we celebrate 115 years of excellence as a publisher, meeting convener, and multi-faceted scientific society, this year also marks an important 15-year milestone in the open access movement. In 2002, the Budapest Open Access Initiative was hosted by the Open Society Foundations and to this day serves as a landmark meeting in communicating the importance and urgency of open access necessities.
The ECS Organic and Biological Electrochemistry (OBE) Division is currently accepting nominations:
“The
Taking a detailed look inside energy storage systems could help solve potential issues before they arise. A team of researchers from Brookhaven National Laboratory are doing just that by imaging the inner workings of a sodium-metal sulfide battery, leading them to understand the cause of degraded performance.