Tim Harford tells the fascinating stories of inventions, ideas and innovations which have helped create the economic world.
http://www.bbc.co.uk/programmes/p04b1g3c
Chess algorithms
In 1997, Garry Kasparov, widely regarded as the world's greatest chess player, was defeated by Deep Blue, a computer. But how much did that reveal about the 'brainpower' of machines? Tim Harford explains by delving into the history of algorithms. They've been used by mathematicians and scientists for millennia, but have acquired a new level of power and importance in the digital age.