3 principles for creating safer AI | Stuart Russell

What makes life worth living in the face of death | Lucy Kalanithi

A climate solution where all sides can win | Ted Halstead

A secret weapon against Zika and other mosquito-borne diseases | Nina Fedoroff

Why school should start later for teens | Wendy Troxel

When Black women walk, things change | T. Morgan Dixon and Vanessa Garrison

Poverty isn't a lack of character; it's a lack of cash | Rutger Bregman

Why I speak up about living with epilepsy | Sitawa Wafula

How to find a wonderful idea | OK Go

How pollution is changing the ocean's chemistry | Triona McGrath

Don't fear intelligent machines. Work with them | Garry Kasparov

The refugee crisis is a test of our character | David Miliband

Am I not human? A call for criminal justice reform | Marlon Peterson

No one should die because they live too far from a doctor | Raj Panjabi

Songs that bring history to life | Rhiannon Giddens

How to design a library that makes kids want to read | Michael Bierut

How to see past your own perspective and find truth | Michael Patrick Lynch

Why glass towers are bad for city life -- and what we need instead | Justin Davidson

To understand autism, don't look away | Carina Morillo

What happens in your brain when you pay attention? | Mehdi Ordikhani-Seyedlar