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TED2014 is our 30th-anniversary conference, and the speaker lineup is — in a word — thrilling. Speakers will touch on topics ranging from technology, entertainment, design and education to climate change, architecture, music, physics, parenting, typography, fireflies and the Golden Gate Bridge. Randall Munroe of xkcd will talk about his passion for What If questions. Yoruba Richen will talk about the fastest-moving social justice campaign in history. Wendy Chung will offer a scholarly overview of what we know right now about autism. And Chris Hadfield of NASA will put down his guitar long enough to talk to us about life in space — and back on earth. Some speakers on the lineup will look back and reflect on things that have happened over the past 30 years. Other speakers will look forward and predict: where are we headed next?

These speakers will be writing “The Next Chapter” of TED. Click the name to read the full bio.

Session 1: Liftoff

Session 2: Retrospect

Session 3: Reshape

Session 4: Wish

Session 5: Us

Session 6: Wired

Session 7: Why?

Session 8: Hacked

Session 9: Signals

Session 10: Passion

Session 11: Unstress

Session 12: Onward

For a photo layout of the sessions »

And for much more information on each and every speaker »

Want to hear these speakers live? Sign up for a TEDLive subscription to experience TED2014 remotely »

Starting March 17, follow TED2014 on the TED Blog »

Be a part of our next conference, TEDGlobal 2014, taking place in Rio de Janeiro, Brazil, in October »

This post was last updated on March 15 to reflect changes to the speaker lineup.