tedtalk Presentation from Jane Goodall or Julia Sweeney Online live-stream lecture Many a popular live-stream lecture Downloadable think piece "Ideas worth spreading" event Presentation by Bill Clinton in 2007 or Bill Gates in 2010 Multimedia think piece The first one was delivered in 1984 Watson's "How we discovered DNA," for one Roger Ebert gave one entitled "Remaking My Voice" in 2011