Stephen Colbert had a really funny explanation of it. I can't seem to find it on youtube, so apologies for the quality: http://www.ebaumsworld.com/video/watch

Stephen Colbert had a really funny explanation of it. I can't seem to find it on youtube, so apologies for the quality: http://www.ebaumsworld.com/video/watch/955486/ http://www.ebaumsworld.com/video/watch/955486/