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

A brief history of melancholy - Courtney Stephens

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

Mac Barnett: Why a good book is a secret door

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

Shubhendu Sharma: How to grow a tiny forest anywhere

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

Why does the universe exist? | Jim Holt | TED

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

Meera Vijayann: Find your voice against gender violence

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

Ziyah Gafić: Everyday objects, tragic histories

Jarrett J. Krosoczka: Why lunch ladies are heroes

The danger of silence | Clint Smith | TED

Megan Washington: Why I live in mortal dread of public speaking

Janet Iwasa: How animations can help scientists test a hypothesis

Ze Frank: Are you human?

David Kwong: Two nerdy obsessions meet — and it's magic

Renata Salecl: Our unhealthy obsession with choice

Which country does the most good for the world? | Simon Anholt

How to Speak So That People Want to Listen | Julian Treasure | TED

What gives a dollar bill its value? - Doug Levinson

Billy Collins: Two poems about what dogs think (probably)

Why do honeybees love hexagons? - Zack Patterson and Andy Peterson

The psychology of your future self | Dan Gilbert

Sting: How I started writing songs again

A glimpse of life on the road | Kitra Cahana

Why good leaders make you feel safe | Simon Sinek | TED

Rives: The Museum of Four in the Morning

The bridge between suicide and life | Kevin Briggs

The science of attraction - Dawn Maslar

Maybe the best robot demo ever | Marco Tempest

Autism — what we know (and what we don't know yet) | Wendy Chung

Dr. Dean Ornish: Your genes are not your fate

Sarah Lewis: Embrace the near win

Louie Schwartzberg: Nature. Beauty. Gratitude.

The flower-shaped starshade that might help us detect Earth-like planets | Jeremy Kasdin

David Sengeh: The sore problem of prosthetic limbs

Why I must come out | Geena Rocero

My Daughter, Malala | Ziauddin Yousafzai | TED Talks

Charmian Gooch: My wish: To launch a new era of openness in business

Is there a difference between art and craft? - Laura Morelli

Mary Lou Jepsen: Could future devices read images from our brains?