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TED

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Eduardo Sáenz de Cabezón: Math is forever

Daniel Kish: How I use sonar to navigate the world

Kevin Rudd: Are China and the US doomed to conflict?

Boniface Mwangi: The day I stood up alone

Bill Gates: The next outbreak? We’re not ready

Bel Pesce: 5 ways to kill your dreams

Eduardo Sáenz de Cabezón: Math is forever

Dan Ariely: How equal do we want the world to be? You'd be surprised

Fred Jansen: How to land on a comet

Barat Ali Batoor: My desperate journey with a human smuggler

Kailash Satyarthi: How to make peace? Get angry

Takaharu Tezuka: The best kindergarten you’ve ever seen

Paul Tudor Jones II: Why we need to rethink capitalism

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Nathalie Cabrol: How Mars might hold the secret to the origin of life

Gary Haugen: The hidden reason for poverty the world needs to address now

Jedidah Isler: How I fell in love with quasars, blazars and our incredible universe

Chris Milk: How virtual reality can create the ultimate empathy machine

Clint Smith: How to raise a black son in America

Nizar Ibrahim: How we unearthed the spinosaurus

Nick Bostrom: What happens when our computers get smarter than we are?

Greg Gage: How to control someone else's arm with your brain

Sophie Scott: Why we laugh

Alice Goffman: How we're priming some kids for college — and others for prison

Pamela Ronald: The case for engineering our food

Abe Davis: New video technology that reveals an object's hidden properties