What a lovely coincidence! Pi day (the 14th of March, written 3/14 in the US) is also Albert Einstein's birthday. How are you going to celebrate? .

Today is Pi day - it's March 14th, written as 3/14 in the US - and to celebrate we bring you some of our favourite Pi articles:

In the movies mathematicians are mostly mad. Since here at *Plus* we firmly believe in our sanity, we're puzzled as to why. So we charged **Charlotte Mulcare** with the unenviable task of sifting through five well-known maths movies and speculate towards an answer.

You might know the famous formula for an area of a circle, but why does this formula work? **Tom Körner**'s explanation really is a piece of cake, served up with a hefty estimate of pi.

Memory is fundamental to the way we think, and we use it in almost every activity. But most of us cannot imagine approaching the level of world record holder Hiroyuki Goto, who memorised and recited 42,195 digits of pi! **Rob Eastaway** asks if mere mortals can learn anything useful from such incredible feats of memory, and gives some hints on how to remember numbers.

Why do so many people say they hate mathematics, asks **David Acheson**? The truth, he says, is that most of them have never been anywhere near it, and that mathematicians could do more to change this perception - perhaps by emphasising the element of surprise that so often accompanies mathematics at its best.

Nineteenth-century German mathematician Leopold Kronecker once said
God created the integers, all the rest is the work of man.