CBC Discover & Learn

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Canal • 22 programes

Societat i cultura

Societat i cultura

Diari
Societat i cultura

Societat i cultura

Sèrie
Ciències de la terra

Ciències de la terra

Setmanal
Notícies

Notícies

Setmanal
Notícies

Notícies

Setmanal
Ciència

Ciència

22/04/2024
Notícies

Notícies

Setmanal

fa 2 dies

A terrifying T. rex of the sea, and more…

The newly described Tylosaurus rex was a violent bus-sized Komodo dragon-like creature with serrated teeth. Dubbed the ‘T. rex of the sea,’ it would have occupied the top of the food chain in the marine ecosystem over 80 million years ago. PLUS: Pigeons use their livers to find their way homeFrom the archives: How Jocelyn Bell Burnell discovered pulsars Scientists discover an underground network of lakes hidden under Arctic ice New book explores the million year history of how we sleep — and why we’re doing it wrong today

fa 2 dies

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54 min
22 de maig

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 de maig

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54 min
fa 4 dies

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

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54 min
22 de maig

Why there's no place like Oz

Even if you aren't a fan of Frank L. Baum's The Wonderful Wizard of Oz, you know about the Tin man, the ruby red shoes and that the dog is named Toto. The classic story was an instant bestseller in 1900 and its popularity is still going strong with not one but a two-part prequel. For over 125 years, there have been derivative works of Oz, from Broadway musicals, films, comic books and more. IDEAS follows the proverbial yellow brick road to uncover how this seemingly simple story of friendship, self reliance and longing for home continues to speak to us. *This episode originally aired on Sept. 9, 2025. If this episode has left you curious about Matilda Joslyn Gage, the suffragist who was a big influence on Frank L. Baum's feminism, listen to this podcast. There's a reason you likely have never heard of her.

22 de maig

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54 min
fa 4 dies

Can we have new pipelines and curb climate change, too?

For the past decade, Canadians have been split 50/50 on new pipelines — that's changed. Two recent opinion polls found roughly three quarters of eligible voters in Canada want at least one new pipeline built to export more fossil fuels. Yet, 70 per cent of people consider climate change a serious threat. IDEAS producer Tom Howell explores the incompatibilities and future scenarios. *This episode originally aired on Oct. 7, 2025. If you liked this episode, you may want to listen to this podcast: A machine that could save us from war — and global warming

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54 min
21 de maig

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 de maig

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54 min
25 de maig

What does it mean for a river to be ‘alive’?

Renowned natural history writer Robert Macfarlane traveled to Ecuador, India and Quebec, pondering the question of whether rivers are living beings — the premise behind much of the movement to legally recognize the rights of nature. He found that the answer to that question is more complicated and wondrous — and more life-altering and world-changing — than he could have imagined. *This episode originally aired on Sept. 3, 2025.

25 de maig

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58 min
15 de maig

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 de maig

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54 min
23 de maig

"Superfake" counterfeits are flooding into Canada. Here's why.

High quality "superfakes" are on the rise, and luxury shoppers are lovin' it. They cost a fraction of the real thing, but who loses when everyone's buying knock-offs? Plus, shrinkflation is everywhere. So what’s being done in Canada to stop it? And, we explore how the Google search bar is changing and why it matters.

23 de maig

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28 min
22 de maig

Kevin O’Leary's Utah data centre will be twice the size of Manhattan. Residents have questions

Why local discussions about data centres are becoming more contentious. PLUS: How fungi thriving in scorched earth could help landscapes recover from wildfiresWhy strippers in Montreal are taking labour action on one of the busiest weekends of the yearInside the vast scam centres of Southeast Asia -- and the human trafficking schemes that help them runRiffed from the Headlines, our weekly musical news quiz.

22 de maig

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54 min

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