Jonathan Haidt: The moral roots of liberals and conservatives

Ian Dunbar: Dog-friendly dog training

Billy Graham: Technology, faith and human shortcomings

The transformative power of classical music | Benjamin Zander | TED

Adam Grosser: A mobile fridge for vaccines

Murray Gell-Mann: Do all languages have a common ancestor?

Stewart Brand: Why squatter cities are a good thing

The habits of happiness | Matthieu Ricard

Wii remote hacks | Johnny Lee

My stroke of insight | Jill Bolte Taylor | TED

The mystery box | JJ Abrams

Isabel Allende: Tales of passion | TED

Gever Tulley: 5 dangerous things you should let your kids do

Lakshmi Pratury: The lost art of letter-writing

Daniel Goleman: Why arent we all Good Samaritans?

Lightning calculation and other "mathemagic" | Arthur Benjamin

Juan Enriquez: Using biology to rethink the energy challenge

Eleni Gabre-Madhin: Building a commodities market in Ethiopia

Hod Lipson: Robots that are "self-aware"

Carolyn Porco: This is Saturn

Steven Pinker: What our language habits reveal

The surprising decline in violence | Steven Pinker

Allison Hunt: How I got my new hip

The 4 a.m. mystery | Rives

Bob Thurman: We can be Buddhas

Jeff Hawkins: How brain science will change computing

Cradle to cradle design | William McDonough

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

Alex Steffen: The route to a sustainable future

Powerful visual illusions | Al Seckel

Averting the climate crisis | Al Gore

The paradox of choice | Barry Schwartz | TED

Choice, happiness and spaghetti sauce | Malcolm Gladwell

Why are we happy? Why aren't we happy? | Dan Gilbert

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

Burt Rutan: Entrepreneurs are the future of space flight

Do schools kill creativity? | Sir Ken Robinson | TED

Dean Ornish: The world's killer diet

Secrets of success in 8 words, 3 minutes | Richard St. John