Pi is part of Egyptian mythology Egyptians believed that the pyramids of Giza were like math marvels, built on the principles ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Trees depicted in ...

Ancient Greek letter and math symbol pi. Credit: Shisma/Wikimedia Commons/ CC BY 4.0 Math fanatics worldwide and everyone else who just loves pi (or pie) celebrate Pi Day on March 14. Pi was named for ...