Ideas from CBC Radio (Highlights)

The infamous "Walled City of Kowloon" was once the most populous spot on the planet. With 1.2 million people per square kilometre, it was a gigantic squatter's village. Paul Kennedy speaks with photographer Greg Girard, and urban designer Suenn Ho.

In 1917, Russia's tsarist dynasty was overthrown and a Communist government took power. A century later, Russia is very much the state of Vladimir Putin, who rules as a strange hybrid of tsarism, Stalinism and post-Cold War turbocharged capitalism.

There's a purity to music. It takes us into its own world, far removed from frustrations and challenges of daily life. But hidden within those innocent-sounding musical flourishes, there often lies a history of passionate disagreement.

Bread is life. But for some, it represents a wrong turn in our species' evolution. Through conversation with bakers, religious leaders, historians and bread aficionados, producer Veronica Simmonds asks whether bread has led us to salvation or damnation.

Canadian-born Frank Gehry has been called the greatest architect of our time. And yet he's still a rebel in his field. IDEAS producer Mary Lynk a rare chance to talk with him in California. Part 2 of a 2-part series.

Canadian-born Frank Gehry has been called the greatest architect of our time. And yet he's still a rebel in his field. IDEAS producer Mary Lynk a rare chance to talk with him in California. Part 1 of a 2-part series.

In 1970, outspoken Harvard biologist George Wald became the first natural scientist to give the CBC Massey Lectures. Lewis Auerbach produced the 1970 Wald lectures. He tells the remarkable backstory of Wald and his Massey talks.

Columbine. Sandy Hook. Orlando. Now Las Vegas: the biggest mass shooting in the history of the United States. The stories seem to follow a pattern: shock, outrage, calls for gun control and rehearsed defences of the status quo, with very little changing.

In labs around the world, scientists -- using the latest biotechnology -- are trying to bring extinct animals back to life. Britt Wray delves into the science, the ethics, and the implications of de-extinction for all animals, including us humans.

Destruction and displacement -- that's the story of Syria today. Paul Kennedy talks with three Syrians who believe in other Syrias, with stories about love, and laughter, and smell of jasmine and tarragon

In Part 3 of her series on the future of work, Jill Eisen looks at the promise of technology — and how it can lead to a better world.

Profanity was once considered rude and crude -- a linguistic last resort. Not so these days. Younger generations use swearing as everyday slang, and academics study it as an ever-evolving form of creative and cultural expression.

Naheed Mustafa tells the story of philosopher-physician Ibn Tufayl who wrote the first Arabic novel "Hayy ibn Yaqzan". It may be the most important story you've never heard.

Digital platforms have been well received by customers, but for workers, they often have a dark side. And they present a major challenge for governments who are grappling with how to regulate them.

Three Indigenous PhD students (Réal Carrière , Keri Cheechoo and Cherry Smiley) share their insights at a public forum hosted at the Congress of the Humanities and Social Sciences. The theme: “The Next 150, on Indigenous Lands.”