# Space-Pi!

Pi is for planets, and spacecraft, for orbital dynamics and craters. It's 3.14, and it's all about circles.

# When it comes to calculating pi, two wrongs might make a right

A great deal of time has been spent working out the facts about pi. At one point, the "facts" were wrong. And a mathematician caught the error by using something that, well, might also be wrong.

# Why don't the Simpsons live in a base 8 world?

The latest episode of Numberphile delves into a particularly interesting reference to pi from the Simpsons episode "Marge in Chains," while raising the very valid question as to why the Simpsons – who have eight fingers apiece – don't live in a base eight world.

# Will you be having a pi party?

Do you feel like having a once-every-thousand-year party? You only have a couple of years to set it up. Some of us will be planning 2015 Pi Parties — in some cases because we like math, and in other cases because we want an excuse to eat pie for breakfast. Let us know if you're going to be involved.

# 7 Numbers That Are Just as Cool as Pi

We may be celebrating Pi Day here at io9, but we would be irrational to deny that there’s more to mathematical interestingness than simply dividing an object’s circumference by its diameter. Here are seven numbers we love as much as pi.

# The first 4,000,000 digits of Pi, visualized in a single image

Pi is what's known as an irrational number, which means that its decimal representation is both infinite and non-repeating.

# Who says you can't use maths in your daily life?

Pro-tip on pi-tips: this will come off as even more clever if you actually ordered pie. Or a pi pie.

# The Eccentric Crank Who Tried To Legislate The Value Of Pi

There's an old urban legend about a state legislature that passed a law redefining pi so that it equaled 3. This story is a myth - but the true story that inspired it is actually even more ridiculous and bizarre.

# Find pi with a sewing needle

Holidays are a good time to find the answer to complex mathematical problems using household items, MacGyver-style. One way to find pi (yes, that pi) involves a flat surface, a little twig or pin, and patience.

# Epic pi quest sets 10 trillion digit record

A pair of pi enthusiasts have calculated the largest chunk of the mathematical constant yet, reaching just over 10 trillion digits. Alexander Yee and Shigeru Kondo, respectively a computer scientist in the US and a systems engineer in Japan, fought hard-drive failures and narrowly missed widespread technical…

# Why we have to get rid of pi for the sake of good math

Pi is perhaps the most beloved number in the world. People devote an entire day to celebrating it; enthusiasts memorize it to hundreds of thousands of places; and it's even pretty useful for calculating the properties of circles and spheres. But pi hides some very important mathematical truths. Put another way, pi is…

# Clint Mansell to score Moon director's consciousness-swapping terrorism …

Good news, soundtrack aficionados! Pi and Moon composer Clint Mansell will be scoring The Source Code, Duncan Jones' upcoming flick about a soldier (Jake Gyllenhaal) whose consciousness is transferred into the body of a commuter who's witnessed a train bombing.

# The Brazilian SciFi Short "Analog" Is Minimalist Cyberweirdness

This creepy-cool trailer for EBBËTO's 25-minute-long film Analog is an agoraphobe's worst nightmare -a machine keeps a man alive during a deep space journey. Unfortunately, the machine begins to reassess its programming, and a lot of symbolic oddness precipitates.

# The Perfect Playlist For Your Pi Day Party

Today (3/14) is Pi Day, a hallowed celebration in which radius and circumference lovers everywhere convene to eat circular pastries and challenge each other to decimal-reciting contests. Score your festivities with the awesomely underrated soundtrack to Darren Aronofsky's Pi.

# Mathematicians Create Algorithm So Complex No Computer Can Use It...Yet

Quantum computers, which would rely on quantum mechanical concepts like superposition and entanglement to perform operations of unimaginable complexity, remain a pipe dream. But physicists have nevertheless come up with an algorithm that only quantum computers could use.

# A Happy Ending to the Movie "Pi" in Real Life

If you saw Darren Aronofsky's frenetic, disturbing flick Pi, you know that its hero, a supergenius who invents a super algorithm, meets a rather terrible end. Though he wants to use his algorithm for the forces of good, he's pursued by evil corporate schemers who want to use it to predict the stock market. Eventually…

# Pi Meets Cube In Fermat's Room

A new Spanish film features four rival scientists struggling to solve logic puzzles before the walls of the room they're trapped in squish them into jelly. Fermat's Room combines elements of Pi (brilliant new untried math theorems) with Cube (deadly rooms that'll kill you unless you figure out the puzzle) in this…

# Must See: Pi

Must-see movies are futuristic classics that shouldn't be missed. Of course, not every must-see is perfect. That's why we've rated them 1-5 on the patented "crunchy goodness" scale. Written by Sherilyn Connelly.

Title: Pi
Date: 1998

Vitals: A mathematician is obsessed with finding a pattern of numbers which (according …