Warning : Clicking through to see the top 20 most watched TEDTalks is akin to finding a new show on Netflix. It will kill your day. If you must (and you really do) see the top 20 talks in TED six-year history, clear your calendar, shut off your email, go to the bathroom and open your mind. You’re about to learn something. TED tabulated data from its top sources including TED.com, YouTube, Hulu, iTunes, and several others.