Håkon Wium Lie, Father Of CSS, Talks About HTML 5
Lie proposed the concept of Cascading Style Sheets (CSS) in 1994 while with the W3C. CSS details how documents are presented on screen, in print and even how the text is pronounced in audio. Lie even worked with Tim Berners-Lee and Robert Cailliau on the World Wide Web project at CERN.
For more details, be sure to watch the video of the discussion: