CBC Discover & Learn

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Kanal • 22 Sendungen

Gesellschaft und Kultur

Gesellschaft und Kultur

Täglich
Geowissenschaften

Geowissenschaften

Wöchentlich
Gesellschaft und Kultur

Gesellschaft und Kultur

Halbwöchentlich
Nachrichten

Nachrichten

Wöchentlich
Gesellschaft und Kultur

Gesellschaft und Kultur

26.11.2024
Wissenschaft

Wissenschaft

22.04.2024
Kunst

Kunst

11.07.2023

vor 4 Tagen

How port cities like Alexandria shaped the world

Alexandria has been the source of invention, innovation, and beauty for millennia — capturing the imagination of Napoleon, the Prophet Muhammad and, of course, Alexander the Great. He envisioned a place that thrived on cultural, intellectual, economic, political and religious exchange. IDEAS examines the big ideas of this port city in Egypt with Islam Issa, author of Alexandria: The City That Changed the World. Part three in our ongoing series about how port cities shaped the world as we know it. Listen to Part Two: How port cities of Elmina shaped the world Listen to Part One: How port cities like Singapore shaped the world

vor 4 Tagen

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54 Min.
vor 2 Tagen

The most important numbers in the universe

Numbers get their due credit in this podcast. Even if we're not aware of them, numbers are essential to how we experience the world. IDEAS explores the most bizarre, surprising, mind-blowing and fundamental numbers in the universe. This panel discussion was recorded live at The Perimeter Institute for Theoretical Physics in Waterloo, Ontario. Guests in this episode: Asimina Arvanitaki is a particle physicist and the Aristarchus Chair in Theoretical Physics at the Perimeter Institute. Ben Webster is an associate professor in the Pure Mathematics Department at the University of Waterloo, and he’s an associate faculty member at the Perimeter Institute. Matthew Johnson is an assistant professor of physics and astronomy at York University.

vor 2 Tagen

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54 Min.
22. Mai

Listening in on fish grunts, and more…

Scientists recorded audio and video of 8 different kinds of rockfish living in the wild near British Columbia, and were surprised they could tell the species apart through their various grunts, pops and knocks, even though the fish are closely related. PLUS: DNA identifies four Franklin Expedition sailors — and solves a 160-year-old mysteryImmune cells that fight infection get a boost from food Radio waves let us see the unseeable: black holes, pulsars and volcanoes on VenusFrom the archives: What will the Earth look like in 2050?Quirks Question: If chicken and fish blood is red, why are they white meats?

22. Mai

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54 Min.
21. Mai

Escaped slaves, pirates and 'free love' in ancient history?

Ancient history just got an upgrade. Forget the ruins, empires and great thinkers of the Classical period and make way for escaped slaves, subversive pirates, and freethinking religious sects. These nonconformist communities rejected hierarchy and political order in favour of creating a more equitable society. Author, religious scholar and historian Christopher Zeichmann offers an alternative lens on the Greco-Roman era in his book called Radical Antiquity: Free Love Zoroastrians, Farming Pirates, and Ancient Uprisings.

21. Mai

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54 Min.
19. Mai

What North Korea’s personality cult has to do with Jesus

North Korea is no place for evangelical Christians today. But when journalist Jonathan Cheng peeled back decades he found out Christianity is at the heart of the Kim family’s rise to power and continuing dynasty. Cheng has spent 15 years and two trips to North Korea to piece this all together. His book is called Korean Messiah. Jonathan Cheng is the China bureau chief for The Wall Street Journal, and was previously the Korea bureau chief, running coverage of the Korean peninsula, including politics and society in both North and South Korea.

19. Mai

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54 Min.
15. Mai

How dandelion seeds take flight, and more…

In a study inspired by a field of dandelions, researchers wanted to know why, when you blow on a dandelion seed head, only the seeds closest to you take flight. They found that a dimple in the seed heads where the seed attaches is larger on one side than the other, and that the seeds consistently broke off from the smaller side of that dimple. Once they take flight, each dandelion seed uses its unique shape to catch a ride on the wind. PLUS: Infrasound, not ghosts, may be why old buildings give us the heebie-jeebiesThese arms are made for lovin'. How male octopuses find their matesFrom the archives: Donald Johanson on the discovery of 'Lucy,' our missing linkVirtual hearts help doctors fix patients’ life-threatening irregular heart beatsQuirks Question: What’s the benefit for trees being evergreen?

15. Mai

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54 Min.
18. Mai

Why laughter is so contagious

If you want to hear what a laughing rat sounds like this podcast is for you. From why the sound of laughter triggers us to join in, to how a laughing yoga class starts, to the difference between AHA and HAHA in science, IDEAS contributor Peter Brown takes us on a joyride to reveal the mystery of laugher. Will this podcast make you laugh? Most likely. But it's better than catching a cold. *This episode originally aired on Nov. 4, 2020.

18. Mai

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54 Min.
15. Mai

He championed a radical dream — a 'United States of Africa'

Africa is a centre of world history — a fact that's been deliberately obscured, says journalist Howard W. French. In this talk based on his book, The Second Emancipation, he explores the surprisingly early seeds of 20th century Pan-African thought, and how Kwame Nkrumah of Ghana went from reluctant student to influential leader of a free Ghana. Howard W. French delivered the Black History Month lecture at University of Toronto's New College. French was is a former New York Times bureau chief based in Shanghai. He now teaches journalism at Columbia University and is also the author of Born in Blackness.

15. Mai

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54 Min.
11. Mai

Pt 2 | What the River Wants to Be

For thousands of years, estuaries were central to Indigenous agriculture on the West Coast. Then, when colonists arrived, they diked many of these ecosystems to create western farmland. Now, Cowichan Tribes is working with a group of scientists and conservationists to restore an estuary as an ecosystem and a food system — and the project has sparked an unexpected controversy. At the heart of the debate are two questions. What does agriculture really mean? And when the waters start to rise, do we work with them, or against them? This is the second and final part of this series, What the River Wants to Be. Listen to Part One. Guests in this podcast: Tom Reid is the West Coast Conservation Manager for the Nature Trust of BC. Jared Qwustenuxun Williams is a passionate traditional foods chef who works with elders and knowledge holders to keep traditional food practices alive. Dr. Jennifer Grenz is a Nlaka’pamux scholar and a member of the Siil'na'mut Ken Elliott is a Cowichan elder and plant knowledge keeper who has worked in habitat restoration for decades. With his wife, he runs Ken Elliott's Native Plant Nursery. Nava Sachs is a graduate student at UBC conducting research with the Indigenous Ecology Lab. Kim Lagimodiere is the acting Marine Projects Manager at the Lulumexun Lands and Natural Resources department of Cowichan Tribes. She is also the coordinator of the S-hwuhwa'us Thi'lut Kw'atl'kwa (Thunderbird Protecting the Ocean) program. Dr. Bethany Coulthard is the acting director at the Lulumexun Lands and Natural Resources department of Cowichan Tribes. Dr. Lenore Newman is the Director of the Food and Agriculture Institute at the University of the Fraser Valley. Erica Gies is the author of Water Always Wins: Thriving in an Age of Drought and Deluge and an independent journalist who covers water, climate change, critters, and more from Victoria, British Columbia, and San Francisco, California.

11. Mai

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54 Min.
8. Mai

Can abolishing all political parties topple fascism?

Simone Weil had a radical solution to end fascism that surged through Europe in the aftermath of the First World War: abolish political parties. She argued political parties were not democratic, they were dangerous. IDEAS producer Nicola Luksic explores the French philosopher's enduring insights to help us better understand the current political climate. *This episode originally aired on Oct. 20, 2025. Guests in this episode: Kathryn Lawson is a faculty fellow at Kings Universy College in Halifax, Nova Scotia. Scott Ritner is a political theorist and Simone Weil scholar. He teaches political science and first-year writing at the University of Colorado in Boulder. Michael Ignatieff is a professor of historical studies at the Central European University in Vienna. He was the head of the CEU when it was based in Budapest. Ignatieff is also the former leader of the Liberal Party of Canada and he led the official opposition in the House of Commons from 2008 to 2011.

8. Mai

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54 Min.

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