700 million people still live without electricity. Here’s how to fix that | Jacqueline Novogratz

In this perspective-shifting talk, Danny Hillis prompts us to approach global issues like climate change with creative scientific solutions. Taking a stand for solar geoengineering, he looks at contro...

5 Apr 20187min

There's no such thing as throwing something away, says Andrew Dent -- when you toss a used food container, broken toy or old pair of socks into the trash, those things inevitably end up in ever-growin...

4 Apr 201810min

In 2009, journalist and screenwriter Drew Philp bought a ruined house in Detroit for $500. In the years that followed, as he gutted the interior and removed the heaps of garbage crowding the rooms, he...

3 Apr 201813min

Irina Kareva translates biology into mathematics and vice versa. She writes mathematical models that describe the dynamics of cancer, with the goal of developing new drugs that target tumors. "The pow...

3 Apr 20187min

How can we make AI that people actually want to interact with? Raphael Arar suggests we start by making art. He shares interactive projects that help AI explore complex ideas like nostalgia, intuition...

2 Apr 201811min

Four decades ago, Judith Heumann helped to lead a groundbreaking protest called the Section 504 sit-in -- in which disabled-rights activists occupied a federal building for almost a month, demanding g...

30 Mar 201817min

As a humanist, Leo Igwe doesn't believe in divine intervention -- but he does believe in the power of human beings to alleviate suffering, cure disease, preserve the planet and turn situations of pove...

29 Mar 201810min

Ndidi Nwuneli has advice for Africans who believe in God -- and Africans who don't. To the religious, she advises against using God to outsource responsibility for what happens in their lives. To the ...

29 Mar 201813min