8 ways the world could suddenly end: Stephen Petranek at TEDxMidwest

5 steps to designing the life you want | Bill Burnett | TEDxStanford

The Unusual Earth Orbit Circling Above Our Ancient Past | Roger G. Gilbertson | TEDxColoradoSprings

Tom Brokaw's Big Ideas: Tom Brokaw at TEDxPortland

Is Time Travel, Especially Into the Past Possible? | Matt Szydagis | TEDxSchenectady

Why do we celebrate incompetent leaders? | Martin Gutmann | TEDxBerlin

What if Everything You Know is Wrong: Bob McDonald at TEDxVictoria 2013

How to learn any language in six months | Chris Lonsdale | TEDxLingnanUniversity

Why sex really matters | David Page | TEDxBeaconStreet

You are a Simulation & Physics Can Prove It: George Smoot at TEDxSalford

How to Achieve Your Most Ambitious Goals | Stephen Duneier | TEDxTucson

Putting Yourself Out There | Lori Granito | TEDxLingnanUniversity

Stoicism as a philosophy for an ordinary life | Massimo Pigliucci | TEDxAthens

The first 20 hours -- how to learn anything | Josh Kaufman | TEDxCSU

Why fasting bolsters brain power: Mark Mattson at TEDxJohnsHopkinsUniversity

Self Worth Theory: The Key to Understanding & Overcoming Procrastination | Nic Voge | TEDxPrincetonU

What animals are thinking and feeling, and why it should matter | Carl Safina | TEDxMidAtlantic

Supermassive black holes: most powerful objects in the universe | Martin Gaskell | TEDxMeritAcademy

Think Fast. Talk Smart | Matt Abrahams | TEDxMontaVistaHighSchool

Choices that can Change your Life | Caroline Myss | TEDxFindhornSalon

The science of emotions: Jaak Panksepp at TEDxRainier