How do vitamins work? - Ginnie Trinh Nguyen

Thomas Piketty: New thoughts on capital in the twenty-first century

Daria van den Bercken: Why I take the piano on the road … and in the air

A brief history of melancholy - Courtney Stephens

Gail Reed: Where to train the world's doctors? Cuba.

The career advice you probably didn't get | Susan Colantuono

Is telekinesis real? - Emma Bryce

Francis de los Reyes: Sanitation is a basic human right

If matter falls down, does antimatter fall up? - Chloé Malbrunot

Moshe Safdie: How to reinvent the apartment building

Matthew O'Reilly: "Am I dying?" The honest answer.

Eman Mohammed: The courage to tell a hidden story

How cosmic rays help us understand the universe - Veronica Bindi

Where do genes come from? - Carl Zimmer

The history of tattoos - Addison Anderson

Mac Barnett: Why a good book is a secret door

Andrew Connolly: What's the next window into our universe?

What is the Heisenberg Uncertainty Principle? - Chad Orzel

Particles and waves: The central mystery of quantum mechanics - Chad Orzel

What makes us get sick? Look upstream | Rishi Manchanda

Uldus Bakhtiozina: Wry photos that turn stereotypes upside down

How not to be ignorant about the world | Hans and Ola Rosling

Dan Barasch: A park underneath the hustle and bustle of New York City

I am the son of a terrorist. Here's how I chose peace | Zak Ebrahim

Colin Grant: The son of a difficult father

Shubhendu Sharma: How to grow a tiny forest anywhere

Corruption, wealth, and beauty: The history of the Venetian gondola - Laura Morelli

Isabel Allende: How to live passionately—no matter your age | TED

Why we love repetition in music - Elizabeth Hellmuth Margulis

Why does the universe exist? | Jim Holt | TED

Jill Shargaa: Please, please, people. Let's put the 'awe' back in 'awesome'

Sally Kohn: Don’t like clickbait? Don’t click

What did dogs teach humans about diabetes? - Duncan C. Ferguson

Meera Vijayann: Find your voice against gender violence

Rose Goslinga: Crop insurance, an idea worth seeding

What happens when you remove the hippocampus? - Sam Kean

Martin Rees: Can we prevent the end of the world?

Ziyah Gafić: Everyday objects, tragic histories

Depressed dogs, cats with OCD -- what animal madness means for us humans | Laurel Braitman

What can Schrödinger's cat teach us about quantum mechanics? - Josh Samani

Jarrett J. Krosoczka: Why lunch ladies are heroes

Aziza Chaouni: How I brought a river, and my city, back to life

Tim Berners-Lee: A Magna Carta for the web

The danger of silence | Clint Smith | TED

Eric Liu: Why ordinary people need to understand power

How do you know you exist? - James Zucker

Dan Pacholke: How prisons can help inmates live meaningful lives

Beware, fellow plutocrats, the pitchforks are coming | Nick Hanauer