The infamous and ingenious Ho Chi Minh Trail - Cameron Paterson

Bono: The good news on poverty (Yes, there's good news)

Stewart Brand: The dawn of de-extinction. Are you ready?

What is verbal irony? - Christopher Warner

David Anderson: Your brain is more than a bag of chemicals

How Mendel's pea plants helped us understand genetics - Hortensia Jiménez Díaz

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

"To This Day" ... for the bullied and beautiful | Shane Koyczan

Kakenya Ntaiya: A girl who demanded school | TED

The difference between classical and operant conditioning - Peggy Andover

A guerilla gardener in South Central LA | Ron Finley

How we found the giant squid | Edith Widder

The simple story of photosynthesis and food - Amanda Ooten

How to green the world's deserts and reverse climate change | Allan Savory

The art of asking | Amanda Palmer

Jennifer Granholm: A clean energy proposal -- race to the top!

Sugata Mitra: Build a School in the Cloud

Bruno Maisonnier: Dance, tiny robots!

Insights into cell membranes via dish detergent - Ethan Perlstein

Bruce Feiler: Agile programming -- for your family

Why are blue whales so enormous? - Asha de Vos

Michael Dickinson: How a fly flies

Andreas Schleicher: Use data to build better schools

Afra Raymond: Three myths about corruption

Keith Chen: Could your language affect your ability to save money?

Miguel Nicolelis: A monkey that controls a robot with its thoughts. No, really.

Inventing the American presidency - Kenneth C. Davis

Young-ha Kim: Be an artist, right now!

The secret to desire in a long-term relationship | Esther Perel | TED

Fresh water scarcity: An introduction to the problem - Christiana Z. Peppard

James B. Glattfelder: Who controls the world?

Inside OKCupid: The math of online dating - Christian Rudder

Edi Rama: Take back your city with paint

Erik Schlangen: A "self-healing" asphalt

Where we get our fresh water - Christiana Z. Peppard

Dare to Educate Afghan Girls | Shabana Basij-Rasikh | TED Talks

How Curiosity got us to Mars - Bobak Ferdowsi

Lee Cronin: Print your own medicine

Cesar Kuriyama: One second every day

Tyler DeWitt: Hey science teachers -- make it fun

Zahra' Langhi: Why Libya's revolution didn't work -- and what might

How polarity makes water behave strangely - Christina Kleinberg

Fahad Al-Attiya: A country with no water

What if we could look inside human brains? - Moran Cerf

iO Tillett Wright: Fifty shades of gay

Life of an astronaut - Jerry Carr

Mitch Resnick: Let's teach kids to code

In on a secret? That's dramatic irony - Christopher Warner