From TEDGlobal’s speaker list of more than 90 — including 18-minute talks, demos and TED U courses — 13 of our scheduled speakers already have TEDTalks online from previous TEDs and partners. To find them, check out our new theme, Speaking at TEDGlobal 2009, and watch archive gems from these returning speakers. All of these speakers are bringing something new to TEDGlobal 2009, exploring the theme of the conference, “The Substance of Things Not Seen.”

Browse the new theme Speaking at TEDGlobal 2009 >>

See the full conference schedule for TEDGlobal 2009, July 21-24 in Oxford >>