Environmental scientist David Keith proposes a cheap, effective, shocking means to address climate change: What if we injected a huge cloud of ash into the atmosphere to deflect sunlight and heat?

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 controversial solutions with open-minded curiosity.

Challenges and problems can derail your creative process ... or they can make you more creative than ever. In the surprising story behind the best-selling solo piano album of all time, Tim Harford may just convince you of the advantages of having to work with a little mess.

Nobody joins a cult on purpose, says Sarah Edmondson, a former member of the infamous Nxivm cult and one of the three whistleblowers that led to its downfall. She explains how she got ensnared in this highly manipulative group — and then escaped it — and shares red flags to help you distinguish between a cult and a safe community.

The coronavirus pandemic shattered the global economy. To put the pieces back together, we need to make sure money is going to the countries that need it the most -- and that we rebuild financial systems that are resilient to shocks, says Kristalina Georgieva, managing director of the International Monetary Fund. She takes us inside the massive ...