"QI" is the smartest comedy show on British television, but few people know that we're also a major legal hit in Australia, New Zealand, Israel and Africa and an illegal one on BitTorrent. We also write books and newspaper columns; run a thriving website, a Facebook page, a Twitter feed; and produce an iPhone App and a sister Radio 4 programme. At the core of what we do is the astonishing fact - painstakingly researched and distilled to a brilliant and shocking clarity. In Einstein's words: 'Everything should be as simple as possible, but not simpler.'Did you know that: cows moo in regional accents; the entire internet weighs less than a grain of sand; the dialling code from Britain to Russia is 007; potatoes have more chromosomes than human beings; the London Underground has made more money from its famous map than it has from running trains; Tintin is called Tantan in Japanese because TinTin is pronounced 'Chin chin' and means penis; the water in the mouth of a blue whale weighs more