Quirks and Quarks

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.

10 years ago we first saw gravitational waves — what we’ve seen since

In September 2015, LIGO—or Laser Interferometer Gravitational-Wave Observatory—captured the ripples in spacetime produced by the cataclysmic merger of two black holes, from over a billion light years away. This discovery confirmed Einstein’s hypothesis about gravitational waves and gave astronomers a new way to explore the cosmos. In the decade since, LIGO’s scientific team, including physicist Nergis Mavalvala, has been busy, including new results announced this week confirming a 50-year-old prediction by Stephen Hawking about how black holes merge. Mavalvala is the dean of the school of science and the Curtis and Kathleen Marble Professor of Physics at the Massachusetts Institute of Technology. The latest discovery was reported in the journal Physical Review Letters.

What wild killer whales sharing food with humans says about their intelligence

After an experience of being offered a recently killed seabird by an Orca, cetologist Jared Towers decided to document other instances of killer whales approaching humans to share a snack. Towers, the executive director of the marine research nonprofit Bay Cetology, found dozens of examples of this behaviour. It’s a perhaps unique example of a wild creature sharing food with humans for its own diversion and curiosity. The research was published in the Journal of Comparative Psychology.

Sweat science — This research really was 90% perspiration

While the biology of perspiration is relatively well understood, the physical process by which water excreted from our skin cools us is not. This motivated engineer Konrad Rykaczewski to strap himself into a specialized full-body, tube-filled suit to observe how water emerges from sweat glands over the skin. Rykaczewski, a thermal and materials engineer at Arizona State University, found that sweat rises out of sweat glands in pools, eventually spilling out and soaking the top layer of the skin. The research was published in the Journal of the Royal Society Interface.

What came first, the tomato or the potato?

As it turns out, the potato came from the tomato. By tracking their genetic lineage, an international team of researchers, including University of British Columbia botanist Loren Rieseberg, have found that the noble potato actually resulted from the tomato naturally cross-breeding with another unrelated species, more than eight million years ago. The research was published in the journal Cell.

Bringing science education to the incarcerated

We speak with a scientist who spent much of his summer working in Canadian prisons doing brief, but intense, science education courses. Phil Heron created the Think Like a Scientist program to teach critical thinking skills to those who may have had negative experiences with education. He believes that the scientific method will help people understand how failure in life, as in science, can be a pathway to success.

We spoke to:

Phil Heron, assistant professor at the University of Toronto, Scarborough campus, in the department of physical and environmental sciences and founder of the Think Like a Scientist program.

Dalton Harrison, founder of Standfast Productions and former program participant finishing a masters degree in criminal justice and criminology.

Phoenix Griffin, university student in criminal justice and criminology and former program participant.

Jamie Williams, a director with Spectrum First Education and a co-facilitator of Think Like a Scientist.

Every summer, Canadian scientists leave their labs and classrooms and fan out across the planet to do research in the field. This week, we’re sharing some of their adventures.

Camping out on a remote island with thousands of screaming, pooping, barfing birds

Abby Eaton and Flynn O’Dacre spent their summer on Middleton Island, a remote, uninhabited island that lies 130 kilometers off the coast of Alaska. They were there to study seabirds, in particular the rhinoceros auklet and the black-legged kittiwake, as a part of a long-term research project that monitors the health of the birds to help understand the health of the world’s oceans. Eaton and O’Dacre are graduate students working under Emily Choy at McMaster University in Hamilton, Ontario

Dodging lions and mongooses to monitor what wild dogs are eating in Mozambique

PhD student Nick Wright spent his summer in Gorongosa National Park in Mozambique. After a brutal civil war wiped out 95 per cent of the large mammals in the park, much work has been done to bring back a healthy wildlife population, to mixed success. Nick was monitoring wild dogs this summer to learn what they’re eating, and what effects their recent re-introduction has had on the other animals. Wright is in the Gaynor lab at the University of British Columbia.

Saving ancient silk road graffiti from dam-inundation

The legendary silk road is a network of trade routes stretching from Eastern China to Europe and Africa, used by traders from the second century BCE to the fifteenth century CE. Travelers often left their marks, in the form of graffiti and other markings on stone surfaces along the route. Construction of a dam in Pakistan is threatening some of these petroglyphs, and an international team is working to document them online while there is still time. Jason Neelis, of the Religion and Culture Department, and Ali Zaidi, from the Department of Global Studies, both at Wilfrid Laurier University in Waterloo, Ontario, are part of the team.

Prospecting for World War II bombs in an Ottawa bog

Pablo Arzate's tests of sensor-equipped drones developed for mining uncovered 80-year-old relics leftover from World War II bomber pilot training in the Mer Bleue bog southeast of Ottawa. Arzate, the founder of 3XMAG Technologies from Carleton University, says his newly-developed technology revealed a trove of unexploded ordnance lurking beneath the bog’s surface. 

Technology allows examination of Inca mummies without disturbing them

Andrew Nelson and his team spent the summer in Peru devising new methods of non-invasively scanning Peruvian mummies dating to the Inca period – so they can study them without unwrapping them. In Peru, ancient human remains were wrapped in large bundles along with other objects.  Nelson is a professor and chair of the Department of Anthropology at Western University in London, Ontario. This work is done in conjunction with the Ministry of Culture of Peru.

Eavesdropping on chatty snapping turtles in Algonquin Park

Since 1972, scientists have been spending their summers at the Algonquin Park research station to monitor the turtles living in the area. In recent years, the researchers discovered that these turtles vocalise –– both as adults, and as hatchlings still in the egg. So this summer, Njal Rollinson and his students set out to record these vocalisations to try and understand what the turtles are saying. Rollinson is an associate professor in the Department of Ecology and Evolutionary Biology and the School of the Environment at the University of Toronto.

We're on hiatus for the summer, but we'll return with new episodes on September 6. In the meantime visit our website at cbc.ca/quirks to browse our archives. Have a great summer!

Politically-driven chaos is disrupting U.S. scientific institutions and creating challenges for science in Canada. Science is a global endeavour and collaborations with the U.S. are routine. In this special episode of Quirks & Quarks, we explore what Canadian scientists are doing to preserve their work to assert scientific sovereignty in the face of this unprecedented destabilization. 

Canadian climate scientists brace for cuts to climate science infrastructure and data 

U.S. President Donald Trump’s attacks on climate science are putting our Earth observing systems, in the oceans and in orbit, at risk. Canadian scientists who rely on U.S. led climate data infrastructure worry about losing long-term data that would affect our ability to understand our changing climate. 

With: 

Kate Moran, the president and CEO of Ocean Networks Canada and Emeritus Professor of Oceanography at the University of Victoria 

Debra Wunch, Physicist at the University of Toronto

Chris Fletcher, Department of Geography and Environmental Management at the University of Waterloo

U.S. cuts to Great Lakes science and monitoring threaten our shared freshwater resource

U.S. budget and staffing cuts are jeopardizing the long-standing collaboration with our southern neighbour to maintain the health of the Great Lakes, our shared resource and the largest freshwater system in the world. 

With: 

Jérôme Marty, executive director of the International Association for Great Lakes Research and part-time professor at the University of Ottawa

Greg McClinchey, policy and legislative director with the Great Lakes Fishery Commission

Michael Wilkie, Biologist at Wilfred Laurier University

Brittney Borowiec, research associate in the Wilkie Lab at Wilfred Laurier University

Aaron Fisk, Ecologist and Canada Research Chair at the University of Windsor

Unexpected ways U.S. culture war policies are affecting Canadian scientists 

One of the first things President Trump did after taking office was to sign an executive order eliminating all DEI policies in the federal government. This is having far-reaching consequences for Canadian scientists as they navigate the new reality of our frequent research partner’s hostility against so-called “woke science.”

With:

Dr. Sofia Ahmed, Clinician scientist, and academic lead for the Women and Children’s Health Research Institute at the University of Alberta 

Angela Kaida, professor of health sciences and Canada Research Chair at Simon Fraser University in Vancouver

Dawn Bowdish, professor of immunology, the executive director of the Firestone Institute for Respiratory Health and Canada Research Chair at McMaster University

Kevin Zhao, MD/PhD student in immunology in the Bowdish Lab at McMaster University

Jérôme Marty, executive director of the International Association for Great Lakes Research

Canada has a ‘responsibility’ to step up and assert scientific sovereignty

A 2023 report on how to strengthen our federal research support system could be our roadmap to more robust scientific sovereignty. The Advisory Panel on the Federal Research Support System made recommendations to the federal government for how we could reform our funding landscape. The intent was to allow us to quickly respond to national research priorities and to make Canada a more enticing research partner in world science. 

With: 

Frédéric Bouchard, Dean of the Faculty of Arts and Sciences and professor of philosophy of science at the Université de Montreal. Chair of the Advisory Panel on the Federal Research Support System.

Have you ever wondered how particle accelerators work? Or what microwaves really do to food? Have you spent time pondering the mystery of how ice ages changed the Earth’s rotation or why whales haven’t figured out how to breathe underwater? Well you’ll find out all this and more on our Quirks & Quarks listener question show!

Energy with a grain of salt

Researchers have developed a new sodium metal powered fuel cell with up to triple the output for its weight of a lithium-ion battery. The team from  MIT, including Yet-Ming Chiang, think these fuel cells could have enormous potential for electric vehicles — including flight. They say sodium can be electrically produced from salt on a large scale to facilitate this technology. The research was published in the journal Joule.

Plants hear their pollinators, and produce sweet nectar in response

A new study has found that plants can respond to the distinctive vibrations of pollinating insects by activating sugar-producing genes to produce rich nectar. In contrast they respond to the sound of nectar-stealing non-pollinators by cutting back on sugar. Francesca Barbero, from the University of Turin in Italy, presented this work at a recent joint meeting of the Acoustical Society of America and 25th International Congress on Acoustics.

Penguin poop helps create the cooling clouds over Antarctica 

Penguin guano is rich in ammonia, and when it accumulates in penguin rookeries in Antarctica, that ammonia is released into the atmosphere, encouraging cloud production. Those clouds reflect sunlight into space, but can also trap sunlight reflected from the ice, so have complex climate interactions. This connection was discovered by University of Helsinki researcher Matthew Boyer, and was published in the journal Nature.

Giant sloth family tree suggests trees are just a recent part of it

Sloths used to be giants the size of bears and even elephants before disappearing around 12,000 years ago. An international group of paleontologists including University of Toronto’s Gerry De Iuliis have assembled a comprehensive family tree of the sloth to understand how a group that used to dominate the landscape was winnowed away to only a handful of relatively small, tree dwelling species. The research was published in the journal Science.

Eradicating diseases — Can we wipe out ancient and modern plagues forever?

In 1980 the World Health Organization declared Smallpox officially eradicated, meaning that for the first time, a plague that killed hundreds of millions of people had been eliminated by human ingenuity. It opened the question of whether we could do this for other lethal threats? We look at efforts to eradicate Polio, an ancient plague, and HIV, a more modern epidemic, to understand how researchers are trying to eradicate these diseases , how close they’ve come, and what’s preventing their final victory.

Quirks spoke to Stan Houston, an infectious disease specialist and professor of medicine and public health at the University of Alberta in Edmonton. He’s worked on treating HIV and tuberculosis in places such as Zimbabwe, South Sudan, Ecuador and Alberta.

Catherine Hankins was the chief scientific adviser for the Joint United Nations Program on HIV/AIDS in Geneva, Switzerland. And in 2013, she was named to the Order of Canada and in 2023 was inducted in the Canadian Medical Hall of Fame. She is currently an adjunct professor at the School of Population and Global Health at McGill University and a senior fellow at the Amsterdam Institute for Global Health and Development.

Mutant super-powers give Korean sea women diving abilities

The Haenyeo, or sea women, of the Korean island of Jeju have been celebrated historically for their remarkable diving abilities. For hour after hour they dive in frigid waters harvesting sea-life, through pregnancy and into old age. A new study has shown they are able to do this because of specific genetic adaptations that appeared in their ancestors more than a thousand years ago. These genes make them more tolerant to the cold, and decrease diastolic blood pressure. The women also spend a lifetime training, beginning to dive at age 15 and continuing on until their 80s or even 90s. Melissa Ilardo of Utah University and her team published their findings in the journal Cell Reports.

This dessert is automatic and autonomous 

Care for a slice of robo-cake? Scientists in Europe have baked up a cake with pneumatically powered animated gummy bears, and candles lit by chocolate batteries. They think their edible robotics could develop in the future to food that could bring itself to the hungry and medicine could deliver itself to the sick. Mario Caironi of the Italian Institute of Technology and his colleagues presented their creation at Expo 2025 Osaka.

Shrinking Nemo — heat is causing clownfish to downsize

Scientists have found that clownfish, made famous by the Disney movie Finding Nemo, have an ability never seen before in fish in the coral reefs. When the water they live in gets warmer, they are able to shrink their bodies — becoming a few per cent of their body length shorter — to cope with the stress of the heat. Melissa Versteeg of Newcastle University says the size of the clown anemonefish is important for their survival and their ranking within their hierarchical society. The research was published in the journal Science Advances.

When the music moves you — the brain science of groove

You know that groove feeling you get when you listen to certain music that compels you to shake your bootie? Scientists in France investigated how our brains experience groovy music to better understand how we anticipate rhythms in time. They discovered that we perceive time in the motor region that controls movement. Benjamin Morillion from Aix Marseille Université said they also found a specific rhythm in the brain that helps us process information in time, that could predict if a person thought the music was groovy. The study was published in the journal Science Advances.

Scientists hope a new storm lab will help us understand destructive weather

Extreme weather is far less predictable than it used to be, and now a new research centre at Western University wants to transform our understanding of Canada’s unique weather systems. The Canadian Severe Storms Laboratory will collect nation-wide data on extreme weather, including hailstorms, tornadoes, and flash flooding, and look for patterns to help predict where they’ll be hitting and how to prevent the most damage. 

Producer Amanda Buckiewicz spoke with:

Greg Kopp, ImpactWX Chair in Severe Storms Engineering and CSSL founding director at Western University

Harold Brooks, senior research scientist at NOAA’s National Severe Storms Laboratory

John Allen, associate professor of meteorology at Central Michigan University

Paul Kovacs, executive director of the Institute for Catastrophic Loss Reduction at Western University.

Tanya Brown-Giammanco, director of Disaster and Failure Studies at NIST

Chimpanzees lay down mad beats to communicate

Apart from their rich vocal palette, chimpanzees drum on trees to communicate over long distances. A new interdisciplinary study, led in part by PhD student Vesta Eleuteri and primatologist Cat Hobaiter from the University of St. Andrews, has explored the details of the rhythms they used, and found that different populations drum with rhythms which are similar to the beats in human music. The research was published in the journal Current Biology.

An exciting new fossil of an early ancestor of modern birds gives insight into evolution

Archaeopteryx, a 150 million year-old bird-like dinosaur, is known from about a dozen fossils found in Germany. A new one that has been studied at Chicago’s Field Museum may be the best preserved yet, and is giving researchers like paleontologist Jingmai O’Connor new insights into how the ancient animal moved around the Jurassic landscape. The research was published in the journal Nature.

A house with good bones — in more ways than one

Inspired by the structure of bone, researchers have created limestone-like biomineralized construction materials using a fungal-scaffold that they seeded with bacteria. Montana State University’s Chelsea Heveran said they demonstrated they could mold it into specific shapes that had internal properties similar to bone, and that it remained alive for a month. It’s early days yet, but she envisions a day when they can grow living structural material on site that may even be able heal themselves. The study is in the journal Cell Reports Physical Science. 

A different kind of emotional band-aid

Scientists have created a clever combination of physical sensors and computer technology to produce a flexible band-aid like device that can accurately read emotions when it is stuck to the face. It’s not quite mind reading, but could give physicians better insight into the emotional state of their patients. Huanyu Cheng of Penn State led the work, which was published in the journal Nano Letters.

A scientist explores what it takes to live a longer, better life

Do you want to live forever? As he noticed himself showing signs of age, immunologist John Tregoning decided to find out what he could do to make that possible. So he explored the investigations that scientists are doing into why we age and die — and tried a few experiments on himself. Bob speaks with him about his new book Live Forever? A Curious Scientists’ Guide to Wellness, Ageing and Death. 

Tregoning dutifully documents everything he discovers as he undergoes testing for his heart, gets his genes sequenced, has a bronchoscopy, and follows an extreme diet, among other experiments. But he comes to the conclusion that “when it comes to improving life outcomes, exercise considerably trumps nearly everything I am planning to do whilst writing this book.”

Chimpanzees use medicinal plants for first aid and hygiene

Researchers have observed wild chimpanzees seeking out particular plants, including ones known to have medicinal value, and using them to treat wounds on themselves and others. They also used plants to clean themselves after sex and defecation. Elodie Freymann from Oxford University lived with the chimpanzees in Uganda over eight months and published this research in the journal Frontiers in Ecology and Evolution.

Why this evolutionary dead end makes understanding extinction even more difficult

540 million years ago, there was an explosion of animal diversity called the Cambrian explosion, when nature experimented with, and winnowed many animal forms into just a few. A new discovery of one of the unlucky ones that didn’t make it has deepened the mystery of why some went extinct, because despite its strangeness, it shows adaptations common to many of the survivors. Joseph Moysiuk, curator of paleontology and geology at the Manitoba Museum helped identify the fossil, and published on it in Royal Society Open Science 

A quantum computer demonstrates its worth by solving an impossible puzzle

Imagine taking a sudoku puzzle, handing bits of it to several people, putting them in separate rooms, and asking them to solve the puzzle. A quantum computer using the weird phenomenon of “entanglement” was able to do something analogous to this, which serves as evidence that it really is exploiting quantum strangeness, and could be used for more practical purposes. David Stephen, a physicist at the quantum computing company Quantinuum, and colleagues from the University of Boulder published on this finding in Physical Review Letters.

Roadkill shows that most mammals have fluorescent fur

A researcher who used a range of mammal and marsupial animals killed by vehicles, has demonstrated that the fur of many of these animals exhibit biofluorescence – the ability to absorb light and re-emit it in different wavelengths. They were able to identify some of the fluorescent chemicals, but don’t know why these animals would glow like this. Zoologist Linda Reinhold observed bright colours such as yellow, blue, green and pink on Australian animals like the bandicoot, wallaby, tree-kangaroo, possums and quolls. Their research was published in the journal PLOS One.

Science suggests humans are not built for the information age

We are living in the age of information. In fact, we’re drowning in it. Modern technology has put vast amounts of information at our fingertips, and it turns out that science is showing that humans just aren’t that good at processing all that data, making us vulnerable to bias, misinformation and manipulation.

Producer Amanda Buckiewicz spoke to:

Friedrich Götz, an Assistant Professor of Psychology at the University of British Columbia.

Vasileia Karasavva, a PhD student in the Department of Psychology at the University of British Columbia.

Timothy Caulfield, professor in the Faculty of Law and the School of Public Health at the University of Alberta, and was the Canada Research Chair in Health Law and Policy from 2002 - 2023.

Eugina Leung, an assistant professor of marketing at the A.B. Freeman School of Business at Tulane University.

Jonathan Kimmelman, a medical ethicist based at McGill University.