Jamil Abu-Wardeh: The Axis of Evil Middle East Comedy Tour

Lisa Margonelli: The political chemistry of oil

Joseph Nye on global power shifts

The case for anonymity online | Christopher "moot" Poole

Hasan Elahi: FBI, here I am!

Michio Kaku Explains String Theory

Neil deGrasse Tyson: Science and Politics | Big Think

Philip Zimbardo: The psychology of time

A call to men | Tony Porter

A Darwinian theory of beauty | Denis Dutton

My stroke of insight | Jill Bolte Taylor | TED

Stefan Wolff: The path to ending ethnic conflicts

Tom Chatfield: 7 ways video games engage the brain

Dianna Cohen: Tough truths about plastic pollution

Dan Cobley: What physics taught me about marketing

Did you hear the one about the Iranian-American? | Maz Jobrani

Sheryl WuDunn: Our century's greatest injustice

Julian Assange: Why the world needs WikiLeaks

Margaret Stewart: How YouTube thinks about copyright

The pattern behind self-deception | Michael Shermer

Debate: Does the world need nuclear energy?

Michael Sandel: The lost art of democratic debate

Seth Berkley: HIV and flu -- the vaccine strategy

Rory Stewart: Why democracy matters

Hans Rosling: Debunking third-world myths with the best stats you've ever seen

Questioning the universe | Stephen Hawking

The Pirate Party - the politics of protest: Rick Falkvinge at TEDxObserver

The true cost of oil | Garth Lenz | TEDxVictoria

TEDxKrakow - Srdja Popovic - How to topple a dictator

The other inconvenient truth | Jonathan Foley | TEDxTC

Drew Curtis: How I beat a patent troll

Bryan Stevenson: We need to talk about an injustice | TED

James Hansen: Why I must speak out about climate change

John Wilbanks: Let's pool our medical data

Jason McCue: Terrorism is a failed brand

What doctors don't know about the drugs they prescribe | Ben Goldacre

[Private video]

Michael Anti: Behind the Great Firewall of China

James Stavridis: How NATO's Supreme Commander thinks about global security

LZ Granderson: The myth of the gay agenda | TED

What we didn't know about male anatomy | Diane Kelly

Reggie Watts disorients you in the most entertaining way | TED

Gary Kovacs: Tracking the trackers

Brian Goldman: Doctors make mistakes. Can we talk about that?

Defend our freedom to share (or why SOPA is a bad idea) | Clay Shirky

How healthy living nearly killed me | A.J. Jacobs

The quest to understand consciousness | Antonio Damasio

Amy Lockwood: Selling condoms in the Congo

Misha Glenny: Hire the hackers!

Michio Kaku: Why Physics Ends the Free Will Debate | Big Think

Neil deGrasse Tyson: My Man, Sir Isaac Newton | Big Think

New insights on poverty | Hans Rosling

Hans Rosling on HIV: New facts and stunning data visuals

David Deutsch: Chemical scum that dream of distant quasars

Why the universe seems so strange | Richard Dawkins

Rebecca MacKinnon: Let's take back the Internet!

Sharmeen Obaid Chinoy: Inside a school for suicide bombers

Mary Roach: 10 things you didn't know about orgasm | TED

Tim Jackson: An economic reality check

The freakonomics of McDonalds vs. drugs | Steven Levitt

Freakonomics: What Prostitutes Can Teach About Economics

Nick Bostrom: Humanity's biggest problems aren't what you think they are

The big secret nobody wants to tell | Bruce Muzik | TEDxSinCity

Daniel Goleman: Why arent we all Good Samaritans?

3 clues to understanding your brain | VS Ramachandran

Emily Oster: What do we really know about the spread of AIDS?

Jonathan Harris: The Web's secret stories

Lawrence Krauss: Our Godless Universe is Precious

Kevin Bales: How to combat modern slavery

Colin Powell: Kids need structure | TED

James B. Glattfelder: Who controls the world?

The way we think about charity is dead wrong | Dan Pallotta

Francis Collins: We need better drugs -- now

Rupert Sheldrake - The Science Delusion BANNED TED TALK

Crossing Mexico's Other Border

Alberto Cairo: There are no scraps of men

Why people believe weird things | Michael Shermer