CBC Discover & Learn

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Canal • 21 programes

Societat i cultura

Societat i cultura

Diari
Notícies

Notícies

Setmanal
Ciències de la terra

Ciències de la terra

Setmanal
Societat i cultura

Societat i cultura

Bisetmanal
Ciència

Ciència

22/04/2024
Notícies

Notícies

Setmanal
Història

Història

08/10/2025

30 DE GEN.

Polar bears are thriving in Svalbard, and more...

Scientists spent nearly 25 years studying close to 800 polar bears in the Barents Sea region and discovered that those polar bears seem to be doing just fine, even though melting sea ice is also a major issue. PLUS: Sargassum seaweed is becoming such a problem, you can see it from spaceWhy some people only get mild sniffles with a cold and others get sickA woolly rhino's DNA found in an ancient wolf’s stomach reveals their quick demiseHow to change a memory — one scientist's quest to understand memory permanence

30 de gen.

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54 min
2 DE FEBR.

Flexing Canada's 'soft power' could help shift geopolitics

"We are in the midst of a rupture, not a transition," Canada's Prime Minster Mark Carney said in a recent speech at the World Economic Forum. The shift in international relations has Carney urging middle power countries to build coalitions and act together to counteract the great power strategy of the day: coercion. How? By flexing our "soft power" — assets a country has that appeal to other countries in international affairs. As it turns out, Canada and a majority of other countries have an opportunity to play a significant role on the international stage, if they choose to take it. This IDEAS episode is a discussion with Jennifer Welsh, McGill University’s Canada Research Chair in Global Governance and Security, moderated by Nahlah Ayed, at the University of Ottawa in the fall of 2025. We also hear from former high commissioner to Britain Janice Charette, former head of MSF Dr. Joanne Liu and climate campaigner Catherine Abreu.

2 de febr.

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55 min
FA 5 DIES

Belugas swap mates for survival, and more…

Researchers made the surprising discovery that Alaska beluga whales have swinging sex lives — and that could be their key to survival in the warming Arctic. Plus: mission to the 'doomsday' Thwaites glacier in Antarctica ends in disappointment near-infrared light therapy offers hope to football players with brain injuries with nuclear power making a comeback, what's changed since the last Atomic Age?

fa 5 dies

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54 min
FA 2 DIES

How a natural catastrophe 8,000 years ago may have fueled Brexit

For the first two billion years, the Earth didn't have oxygen. That's just one of the many fascinating details Peter Frankopan reveals in his book, Earth Transformed: An Untold History. The Oxford professor of global history takes us on a multi-million year tour, illustrating the breathtaking ways climate has shaped the Earth and human civilization. How the collapse of a sediment shelf 8,000 years ago isolated what's now Britain from Europe, and its potential influence on the Brexit vote in 2016. Or how climate fluctuations correlate to periods of antisemitic violence. There's a lot to learn in this podcast. Have a listen.

fa 2 dies

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55 min
4 DE FEBR.

Why the Monroe Doctrine has world leaders on edge

Firstly, you might ask: What is the Monroe Doctrine? It's a U.S. policy created in the 19th century that opposes foreign interference in the affairs of the "Western Hemisphere." It was understood to be a defense of autonomy but its interpretation is mixed. Various presidents over time have used the doctrine for their own purposes, writing their own political agenda onto it. Now is no different, as Donald Trump's government turns to the policy as a way to control the Western Hemisphere. Guests in this episode: Richard Drake is the Lucile Speer Research Chair in politics and history at the University of Montana Max Cameron teaches in the department of political science at the University of British Columbia and is president of the Latin American Studies Association

4 de febr.

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55 min
30 DE GEN.

PT 2 | An injustice system where 'you can buy your way out'

Our justice system was developed under the assumption that both parties in a dispute would each have a lawyer. But the reality is most Canadian's can't afford a lawyer — which makes negotiations unequal. In some jurisdictions as many as 80% of people in family court are self represented. What about legal aid? Very few people are eligible. Our series continues to explore how the justice system is designed to favour people with money. *This episode originally aired on April 26, 2023.

30 de gen.

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55 min
29 DE GEN.

PT 1 | An injustice system where 'you can buy your way out'

Marcell Wilson knows how to game the criminal justice system. He's been charged upwards of 30 times for what he says were “mostly violent crimes" and yet to this day he doesn't have a criminal record. Why? He has money to pay the high fees for a good lawyer. Many scholars and legal commentators agree it’s easier for people with wealth to secure favourable legal outcomes — not just in criminal court but in custody disputes, civil litigation, and child protection matters. In a two-part series, IDEAS contributor Mitchell Stuart asks: is a system like that still capable of administering justice? *This episode originally aired on April 19, 2023.

29 de gen.

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55 min
28 DE GEN.

Can empathy be dangerous?

It depends on who you ask. Until recently empathy was generally considered a positive thing. But a growing number of mostly conservative voices believe empathy can be extremely dangerous — even toxic. Their argument is that empathy can drive irrational thinking and behaviour in public life. The result is a growing battle over empathy in a world that has never seemed to need it more. If you like this podcast, you may want to listen to this: Why practicing empathy is far from simple. Guests in this podcast: Matt Richins – neuroscientist and psychologist, who did research on empathy at Exeter University, UK. Susan Lanzoni – author, historian of psychology, psychiatry, and neuroscience and professor at Harvard’s School of Continuing Education Mary Gordon – founder of Roots of Empathy program, Toronto Michael Slote – author, philosopher and professor of ethics at the University of Miami Margaret Davidson – Roots of Empathy classroom facilitator, Chiganois Elementary Kourtney Simms – Chiganois Elementary teacher Ellie – Grade 1 student, Chiganois Elementary

28 de gen.

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55 min
19/09/2025

Understanding our inner light, and more...

Dust from car tires can be bad for fish — what might it do to us? As car tires wear, they shed billions of ultrafine particles of rubber that contain a complex mix of chemicals, including one called 6PPD-Quinone that’s been linked to mass die-offs of migrating salmon. Now researchers are sounding the alarm that this chemical is accumulating in humans, and we have no clear understanding of its toxicity. An international team of scientists, including Rachel Scholes from the University of British Columbia, are calling for more scrutiny of the chemicals that go into car tires, since so much ends up in our environment. Their paper was published in the journal Environmental Science & Technology Letters. Fecal Transplants seem to have lasting metabolic effects Transplanting the gut microbiome has been held out as a hope for a range of disorders, from obesity to mental health issues. A study that followed obese adolescents four years after receiving a fecal microbiota transplant from healthy individuals has shown positive impacts on the recipients' weight and metabolic health. Dr. Wayne Cutfield, a pediatrician and professor of pediatric endocrinology at the University of Auckland in New Zealand, said they also found after all this time that the donor bacteria have remained established in the recipients' gut microbiome. The study is in the journal Nature Communications. An ant queen clones sexual slaves of another species for her daughters In a truly bizarre tale from the animal world, researchers have discovered a species of ant where the queen gives birth to males of two totally different species. Somewhere along their evolutionary path, these Messor ibericus queen ants in southern Europe developed an ability to clone male Messor structor ants for her daughters to mate with and to produce a hybrid working class. Jonathan Romiguier, an evolutionary biologist from the University of Montpellier in France, said these M. ibericus ants essentially domesticated ants of another species. The study was published in the journal Nature. Why other apes can’t walk a mile in our shoes A feature that distinguishes humans from other primates is the ability to walk upright. The major evolutionary change in the structure of our pelvis that allows for our bipedalism has now been traced genetically and developmentally. Human pelvic blades initially form in the embryo like other primates, but then flip their growth from vertical to horizontal, to give the human pelvis its unique basin shape. This new research led by Terence Capellini, Chair of the human evolutionary biology department at Harvard University and postdoctoral student Gayani Senevirathne, was published in the journal Nature. Women glow. So do men. Understanding our 'inner light' You might have been told by an admirer that you have a unique glow. In two groundbreaking studies, researchers have demonstrated the reality of that poetic compliment. Using ultra-sensitive instruments capable of detecting individual photons, Canadian researchers have imaged a biological source of incredibly faint light, known as Ultraweak Photon Emissions (UPE), that has potential as a future non-invasive diagnostic imaging tool. Daniel Oblak, an associate professor of physics and astronomy at the University of Calgary, oversaw a study where they unequivocally demonstrated that living things, like mice, give off an extremely faint glow that dims when they die. His study was published in The Journal of Physical Chemistry Letters. In a separate study, Nirosha Murugan, — an assistant professor of tissue biophysics at Wilfred Laurier University — discovered that these UPEs can also detect different mental states in the brain. That study was published in the journal iScience.

19/09/2025

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54 min
FA 5 DIES

The trailblazing all-Black baseball team that made history

More than a decade before Jackie Robinson became the first Black player to take the field in Major League Baseball, a ball team from a small Southwestern Ontario city was breaking colour barriers. They were called the Chatham Coloured All-Stars — the first all-Black team to win the Ontario baseball championship. Their historic 1934 season, including the racist treatment they endured and their exploits on the field has resurfaced in an online project. Now the team is getting their due as trailblazing Black Canadian athletes. *This episode originally dropped on Nov. 25, 2024.

fa 5 dies

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55 min

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