When it comes to creating a great work of art, practice makes perfect, writes Matthew Syed.
A design college in the United States has just started a new exhibition about creativity, which will run till January. It is called "Permission to Fail". The curator asked a group of 50 prestigious designers and illustrators to send in their mess-ups, rough drafts and preliminary sketches so that they could be put on display.
http://www.bbc.co.uk/news/magazine-34775411