Daily photo: 28/06/2011
![A circular bowl of plums on a mat decorated with circles A circular bowl of plums on a mat decorated with circles](http://www.astrofiammante.net/wp-content/uploads/2011/06/280611.jpg)
Tau (n): The nineteenth letter of the Greek alphabet; a number proposed by some mathematicians as a more logical alternative to Pi when working with circles.
Tau (n): The nineteenth letter of the Greek alphabet; a number proposed by some mathematicians as a more logical alternative to Pi when working with circles.