16:32Digital Planet31/03/2009 - WWW's 20th birthdayBBC World Service Duration: 26 minutes Tue 31st Mar 2009, 16:32 on BBC World Service OnlineAvailable for over a yearAfrica broadband, Tim Berners-Lee, great firewall of China and galaxy zoo. Show more GenresFactualScience & NatureFormatsMagazines & ReviewsBrandDigital Planet Source: BBC Online