Programming loops are great, but there's a point where they aren't enough. Professor Brailsford explains. EXTRA BITS: https://www.youtube.com/watch?v=DVG5G1V8Zx0 The Most Difficult Program to Compute?: https://www.youtube.com/watch?v=i7sm9dzFtEI What on Earth is Recursion?: https://www.youtube.com/watch?v=Mv9NEXX1VHc Reverse Polish Notation & the Stack: https://www.youtube.com/watch?v=7ha78yWRDlE http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com/