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
Sanitary towel
In the early 20th Century, makers of sanitary towels had to find a way to sell an item that some people found too embarrassing to mention. In some parts of the world, that stigma still hasn't gone away. Tim Harford charts the controversial history of a quietly revolutionary product.