Science Friday

Researchers are connecting two ecological problems in the Northeast in hopes of reducing the risk of tick-borne illnesses. Also, a “one-of-a-kind” fossil of Navaornis hestiae helps fill a giant gap in scientists’ understanding of how bird brains evolved. Managing Some Invasive Plants Might Reduce Blacklegged Ticks In much of the eastern US, October and November usher in an autumn peak of the blacklegged tick season. For years, researchers have noticed that these ticks, also called deer ticks, are more abundant on certain invasive plant species, like Japanese barberry, that create dense thickets in the forest understory. Now, a group of scientists in Vermont and Maine is investigating how managing these plants might decrease the number of blacklegged ticks—and the risk of people developing tick-borne illnesses, like Lyme disease and Babesiosis. After getting a $1.8 million grant from the National Science Foundation, they’re hoping to come up with guidance for landowners. Read the rest at sciencefriday.com. Ancient Bird Fossil Offers Clues Into How Bird Brains Evolved Archaeopteryx is the earliest bird-like dinosaur that we know of. It lived 150 million years ago, but researchers don’t know much about how the bird brain evolved from then to now. An 80 million-year-old bird from the Mesozoic Era is now helping fill in the blanks. It’s called Navaornis hestiae. Researchers uncovered a fossil of this species, which was previously unknown to science, in Brazil in 2016. That specimen has a remarkably well-preserved skull, which a team of paleontologists used to digitally reconstruct the bird’s brain. The researchers recently reported their findings in the journal Nature. Ira talks with a lead author of the study, Dr. Luis Chiappe, a paleontologist and curator at the Natural History Museum of Los Angeles County in California. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Despite advances in scientific research, the stomach remains a subject of mystery and intrigue. After all, it’s nearly impossible to ignore its gurgles and growls. Some cultural understanding of the gut has changed too—from an unruly being that must be fed and placated, to a garden ecosystem that is to be nourished in order to flourish. And if you’re a frequent listener of Science Friday, you’re familiar with the gut’s microbiome—the constellation of trillions of microbes thriving in our bodies. And that the stomach has some of the same neuroreceptors as the brain, which has earned it the nickname of the “second brain.” Ira talks with Dr. Elsa Richardson, author of Rumbles: A Curious History of the Gut and co-director of the Centre for the Social History of Health and Healthcare at University of Strathclyde in Scotland. They discuss the changing cultural and scientific understanding of the gut, including the discovery of the enteric nervous system and Victorian-era physician Sir William Arbuthnot Lane’s obsession with curing constipation. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Leaders from the top-polluting countries, like the US and China, aren’t showing up to the UN’s big climate conference in Azerbaijan. And, walking pneumonia typically affects school-age kids, but the CDC reports a rise in cases in children aged 2-4. At COP29, The World’s Top Polluters Are No-Shows The United Nations’ annual international climate conference, COP29, got underway this week in Baku, Azerbaijan. Leaders from around the world come together at this conference to hammer out deals between nations to lower emissions and coordinate climate change-related financial efforts. And a big focus this year was to negotiate a deal for wealthier countries to financially compensate developing nations who’ve experienced climate-change related damage. The only problem is that world leaders from the top-polluting countries, like the US and China, aren’t even showing up. Ira Flatow is joined by Umair Irfan, senior correspondent at Vox, to catch up on this and other science stories of the week, including new data on rising alcohol consumption, why Voyager 2 got an inaccurate snapshot of Uranus in the 1980s, and why the world’s largest organism might also be its oldest. Walking Pneumonia Is Spiking. Here’s How To Stay Safe Last month, the Centers for Disease Control and Prevention put out a report outlining a significant spike in Mycoplasma pneumoniae infections, better known as walking pneumonia. This respiratory illness is caused by bacteria spread through respiratory droplets, and symptoms usually mimic the common cold. It’s pretty common, with about 2 million infections happening each year, mostly in school-age kids. This year’s spike, which started in the spring, is a little different: There’s been a significant increase in kids aged 2 to 4 and it is now the new leading cause of pneumonia for that group. Dr. Preeti Sharma, pediatric pulmonologist at Children’s Heath in Dallas, knows what it’s like to have a child with mycoplasma pneumonia. Her daughter came home with the illness in the spring. What she thought was a typical cold turned into a deep and lingering cough: a telltale sign of walking pneumonia. Dr. Sharma, who is also an associate professor at UT Southwestern, joins Ira Flatow to discuss this year’s Mycoplasma pneumoniae spike, the best treatments, and how to keep your family healthy this holiday season. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Today, November 8, 2024, marks Science Friday’s 33rd broadcast anniversary. One of the most beloved interviewees on Science Friday over the years was the late neurologist and author Dr. Oliver Sacks, who shared his insights into neuroscience, art, and what it means to be human. Recently, Sacks’ long-time collaborator Kate Edgar published a book of Dr. Sacks' letters. And earlier this fall, the New York Public Library announced its acquisition of Sacks’ entire archive. In this segment, Ira revisits a 2007 conversation with Oliver Sacks about his book Musicophilia. They talk about the way music and the brain interact, why music can sometimes remain in the brain long after other memories fade, and why a person with limited language abilities might still be able to sing unimpaired. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

In a Chinese study, donor CAR-T cells sent autoimmune diseases into remission. There’s hope that the therapy is scalable. And, scientists used decades of yellow-bellied marmot research to find a way to measure how adverse events affect wild animals’ survival. CAR-T Cell Therapies Show Promise For Autoimmune Diseases For decades, immunologists have explored CAR-T cell therapy as an effective tool to fight blood cancer. Increasingly, CAR-T cells are being explored as a potential silver bullet for treating autoimmune diseases, like lupus—which currently have no cure. Thus far, CAR-T cell therapy has largely used CRISPR-modified immune cells from a person to treat that person’s own diseases. But new research from China has made a huge step forward for this treatment: Researchers were successful in using donated CAR-T cells from one person to treat another person’s systemic sclerosis, an autoimmune condition that causes atypical growth of connective tissues. If donor CAR-T cell therapy does indeed work, as posited in this paper, it could mean the therapy is more scalable than it would be otherwise. Joining Ira to talk about this study and its potential impact is Daniel Baker, PhD student in the immunology lab of Dr. Carl June at the University of Pennsylvania. Measuring The Effects Of Early Life Adversity—In Marmots It’s well-established in psychology that if you experience trauma as a child, chances are it’ll impact your physical and mental health as an adult, and could even affect your economic status. In academic terms, this is called early childhood adversity. And psychologists have developed a scoring system for measuring the cumulative effect of adverse childhood experiences, which can include abuse and household dysfunction, and it can help predict health risks later in life. So we can specifically measure that in humans. But what about other animals? If you’ve adopted a dog that’s had a turbulent past, you know that that can result in reclusive or skittish behavior as an adult. But there hasn’t been a good way to measure it in wild animals. Well, a new study from UCLA, published in the journal Ecology Letters, establishes a similar index for wild animals, and it used decades of findings from a mammal: the yellow-bellied marmot. So how could it help conservation efforts for other animals? Ira Flatow talks with Xochitl Ortiz-Ross, a PhD student in ecology and evolutionary biology at UCLA, and one of the authors on that study. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Think back to the last time you went to the doctor’s office. Chances are, at the start of the visit, they took your temperature, pulse, and blood pressure—your “vitals.” But how did they take your blood pressure? The medical literature that describes safe blood pressure ranges is all based on readings taken with the patient sitting with feet flat on the floor, legs uncrossed, back supported, and the testing arm supported by a desk at mid-heart level. But if the blood pressure is measured with the person in a different position—say, perched on the edge of an exam table, legs dangling, and an arm hanging at the side—the readings given by a blood pressure monitor can be distorted. In a recent study published in the journal JAMA Internal Medicine, researchers found that arm position could account for as much as a 7mmHg difference in pressure readings. That difference could be enough to incorrectly classify some people as hypertensive. Dr. Tammy Brady, medical director of the Pediatric Hypertension Program at Johns Hopkins University, joins Ira to talk about the art of blood pressure measurement, how to better track your own blood pressure, how to find blood pressure monitors that have been properly validated, and the importance of advocating for yourself in medical settings. Transcript for this segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Have you ever been stuck in traffic and thought, if only this highway was a little wider so it could fit more cars? You aren’t alone. Many states have been expanding their highways. New York Governor Kathy Hochul recently announced a $1.3 billion project to expand one of the state’s highways for an estimated maximum six-minute travel savings. Other highway-widening projects are underway in Texas, California, and Maryland. In 2022, federal, state, and local governments in the US spent $127 billion on highway construction. Some departments of transportation say expanding highways is necessary to reduce congestion, especially in areas with growing populations, and to encourage economic development. But decades of research shows the opposite effects when highways are expanded—that travel times actually increase when more lanes are added. So how does this happen, and why do we keep expanding highways even though the research says it doesn’t work? Megan Kimble, journalist and author of City Limits: Infrastructure, Inequality, And The Future Of America’s Highways, joins Ira to break down the research behind highway widening and discuss how increasing funding for public transit could help make traffic better, and why some cities are deciding to remove their highways entirely. Read an excerpt from City Limits: Infrastructure, Inequality, And The Future Of America’s Highways. Transcript for this segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Abortion was on the ballot in 10 states, and seven of them passed constitutional amendments defending abortion rights. Also, this ginormous number has a whopping 41,024,320 digits, which isn’t very helpful for mathematicians but is certainly exciting for math nerds. Seven States Passed Ballot Measures To Protect Abortion Rights This week, science was on the ballot in many states. Voters across the country weighed in on issues like drug legalization, money to fund climate programs, and, of course, abortion rights. Ten states voted on the issue, and in seven of them, voters chose to protect or expand abortion rights. Those states are Maryland, Montana, Nevada, New York, Colorado, Arizona, and Missouri. On the flip side, voters in Florida, Nebraska, and South Dakota rejected measures that would protect abortion rights. Ira Flatow talks with Tim Revell, executive editor at New Scientist, about the outcome of some sciencey ballot measures and what we can expect going into another Trump presidency. They also discuss the launch of the world’s first wooden satellite, what scientists learned when they put vampire bats on a treadmill, and more. Math Enthusiast Finds The Largest Known Prime Number Let’s go back to grade school—do you remember learning about prime numbers? They’re numbers that can only be divided by themselves and one. So 2, 3, 5, 7, 11, and so on are prime numbers. The number 12, for example, wouldn’t be prime because you can divide it by other numbers, like 2 and 3. And as you count up and up, prime numbers become more sparse. Math lovers are always competing to find the largest prime number, and just recently, an engineer discovered the largest one—so far. And you won’t believe how ginormous it is: It has more than 41 million digits. Ira talks with Jack Murtagh, math writer and columnist for Scientific American, about why prime numbers are so cool, and the quest to find the largest one. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Author and naturalist Sy Montgomery discusses chicken intelligence and her experience raising a flock in New Hampshire. And, snapshots from over the years could provide researchers with valuable data about how penguin colonies have shifted. Chickens Have Friendships, Memories, And Reputations Chickens don’t exactly have a reputation of being the sharpest creatures in the animal kingdom. Yet, talk to anyone who raises chickens and they’ll tell you that they are far more intelligent and social than we often give them credit for. For example, chickens can recognize the faces of 100 other chickens and find their way home just days after birth. Guest host Rachel Feltman talks with Sy Montgomery, author of the new book, What the Chicken Knows: A New Appreciation of the World’s Most Familiar Bird, about her own flock and what she’s learned about chicken intelligence. Tourist Photos From Antarctica May Help Map Penguin Colonies If you’re lucky enough to visit Antarctica, you’ll probably aim to snag a classic photo—a colony of penguins, set against the chilly, barren landscape. But now, in addition to being a cherished memory, those pictures could turn out to be a valuable source of ecological data. Writing in the journal PLOS One, researchers describe a computer vision technique that uses elevation data combined with landscape features in photographs to allow the images to be positioned in a 3D rendering of the Antarctic landscape. And that allows scientists to map the precise boundaries of penguin colonies over time, even without knowing who held the camera or where the photographer was standing. Dr. Heather Lynch, the Institute for Advanced Computational Science Endowed Professor of Ecology & Evolution at Stony Brook University, joins guest host Rachel Feltman to discuss the technique, and the value in being able to extract scientific data from pictures stored in photo albums and museum archives. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

In the 1960s, the urban air pollution crisis in America had reached a fever pitch: Cities were shrouded in smog, union steelworkers were demanding protections for their health, and the Department of Justice was mounting an antitrust lawsuit against the Detroit automakers for conspiracy to pollute. But all that changed when Richard Nixon signed the Clean Air Act of 1970. The law set national limits for six major pollutants, established stringent emissions standards for vehicles, and required the latest pollution-limiting technology for industrial facilities. It was widely recognized as innovative, landmark legislation because it was evidence-based, future-proofed, and it had teeth. Since the Clean Air Act took effect, emissions of the most common pollutants have fallen by around 80%. The law has saved millions of lives and trillions of dollars. An EPA analysis showed that the Clean Air Act’s benefits outweigh its costs by a factor of 30. Thanks to this policy, the United States enjoys some of the cleanest air in the world. But five decades on, has the Clean Air Act protected everyone? And can a policy designed for the problems of urban, mid-century cities protect our health in the face of climate change? Read the full story at sciencefriday.com. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

On Sunday, more than 50,000 athletes are expected to compete in the New York City Marathon, one of the largest, and most elite marathons in the world. Running a continuous 26.2 miles is a major physical challenge. But what exactly is happening in the body when running such a long distance? Joining guest host Rachel Feltman to answer questions from long-distance runners is Dr. Brandee Waite, Director of UC Davis Health Sports Medicine. Over the past 20 years, Dr. Waite has directed the medical care for multiple marathons and ultra-marathons, and has served as a team physician for USA Track & Field. Transcript for this segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Gender-affirming care is on the ballot in this presidential election. These treatments, which can include hormone therapy and surgeries, can be lifesaving for trans people. But they could be impacted by the results of this election. This year alone, states have considered 182 bills aimed at prohibiting gender-affirming care. It’s become a central part of Donald Trump’s campaign, which has stated that, if he is elected, he’ll ask Congress to ban Medicare and Medicaid from covering gender-affirming care, and cut off federal funding to hospitals and clinics that do provide it. Guest host Rachel Feltman discusses what’s at stake for gender-affirming care this election season with Dr. Logan Casey, director of policy research for the Movement Advancement Project, and Kate Steinle, chief clinical officer at FOLX Health. Transcript for this segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Two years ago, energy companies scrambled for offshore wind contracts. At a recent auction, the demand was significantly lower. Plus, artist Sarah Rosalena uses Indigenous weaving, ceramics, and sculpture practices to create art that challenges tech’s future, in a segment from earlier this year. Maine Offshore Wind Auction Draws Few Bids Offshore wind is coming to the Gulf of Maine. Earlier this week, the US Bureau of Ocean Energy Management held an auction for eight leases to develop wind projects off the coast of Maine. But companies bid on only half of the available leases. Guest host Rachel Feltman talks with Casey Crownhart, senior climate reporter for MIT Technology Review about that and other top science news of the week including; bird flu found in pigs, AI’s electronic waste problem, what’s in your black plastic spatula, and giant rats fighting the illegal wildlife trade. An Artist Combines Indigenous Textiles With Modern Tech When multidisciplinary artist Sarah Rosalena looks at a loom, she thinks about computer programming. “It’s an extension of your body, being an algorithm,” she says. Rosalena, a Wixárika descendant and assistant professor of art at the University of California Santa Barbara, combines traditional Indigenous craft—weaving, beadmaking, pottery—with new technologies like AI, data visualization, and 3D-printing. And she also works with scientists to make these otherworldly creations come to life. She involved researchers at the NASA Jet Propulsion Lab to make 3D-printed pottery with simulated Martian clay. And she collaborated with the Mount Wilson Observatory to produce intricately beaded tapestries based on early-1900s glass plates captured by the observatory’s telescope, which women mathematicians used to make astronomical calculations. And that’s also a big focus for Rosalena: spotlighting the overlooked contributions women made to computer science and connecting it to how textiles are traditionally thought of as a woman-based craft. When she first started making this kind of art, Rosalena learned that the Jacquard loom—a textile advancement in the 1800s that operated on a binary punch card system which allowed for mass production of intricate designs—inspired computer science pioneer Ada Lovelace when she was developing the first computer program. “[They] have this looped history,” she says. “And when I weave or do beadwork, it’s also recalling that relationship.” Read the rest at sciencefriday.com. Transcript for these segments will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Great news for the nearly-extinct monarch butterflies, which will pass through the area as they migrate back to Mexico. Also, to find out how blood affects aging, scientists can surgically connect two animals and let blood circulate between them. After California’s Park Fire, A Second Bloom of Milkweed Don Hankins examines a bright yellow-green patch in the meadow. The land all around is charred by fire. But here, there’s a sort of miracle at work. Native milkweed has sprung up and bloomed for the second time this year. This is not something these plants, Asclepias eriocarpa, also known as Indian milkweed, are known to do. They bloomed in late spring and early summer and had already done so this year when the Park Fire roared through. But the fire seemed to happen at just the right time to coax a second flowering, one that is likely to line up with the return migration of the monarch butterflies south to overwinter in Mexico. Monarchs rely on these flowers to complete their life cycle. For researcher Don Hankins, this is a surprise delight. “We may be coming back into some knowledge here that hasn’t been practiced in a long time,” said Don Hankins, a professor at Chico State, who teaches classes in geography with a focus on fire. He is also a California Plains Miwok traditional cultural practitioner. Read the rest at sciencefriday.com. Inside The ‘Creepy’ Procedure That Taps Into Young Blood While fictional vampires suck the blood of the young to live forever, some researchers have found that certain elements in young blood actually can improve the health of the old. This is possible through a spooky procedure called parabiosis, in which the circulatory systems of two animals are joined, letting the blood flow from one into the other. By connecting old mice and young mice through parabiosis, researchers have observed how different molecules in the blood impact symptoms of aging. While some outcomes have excited experts, enthusiastic biohackers attempting to defy their own aging might have jumped the gun. There’s a long way to go before we understand how elements of young blood might be harnessed to treat aging humans. Emma Gometz, SciFri’s digital producer of engagement, talks to Dr. Tony Wyss-Coray, a neurology professor at Stanford University who has used parabiosis (which he once described as “creepy”) to help reveal how components of our blood affect our cognition as we age. They discuss parabiosis, vampires, and how far the field has to go before humans can benefit. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Did you know that there are ten quintillion—or 10,000,000,000,000,000,000—individual insects on the planet? That means that for each and every one of us humans, there are 1.25 billion insects hopping, buzzing, and flying about. A new book called The Insect Epiphany: How Our Six-Legged Allies Shape Human Culture celebrates the diversity of the insect world, as well as the many ways it has changed ours—from fashion to food to engineering. Guest host Sophie Bushwick talks with entomologist and author Dr. Barrett Klein about the beauty of the insect world, how it has shaped human history, and what we can learn from these six-legged critters. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Leading up to the November election, Science Friday is covering top science issues on the ballot. For voters, those top issues include abortion. Since the Dobbs ruling overturned Roe v. Wade in June 2022, many states have curtailed access to abortion, and 13 states have a total abortion ban. The election season in particular, there’s been a focus on abortions in the third trimester of pregnancy. Some of the political rhetoric is inflammatory and false. But even among politicians who support abortion rights, there’s a tendency to deflect attention away from these procedures later in pregnancy. Though third trimester abortions are rare, they make up about 1% of abortions in the United States and are often the most stigmatized. They are legal in only a small number of states, and just a fraction of providers perform them. To better understand the real science behind abortions later in pregnancy, guest host Sophie Bushwick talks with Dr. Katrina Kimport, professor of obstetrics, gynecology & reproductive sciences at the University of California, San Francisco; and Dr. Cara Heuser, a maternal and fetal medicine physician who specializes in high risk pregnancy and complex abortion care, based in Salt Lake City, Utah. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Walter Byrd remembers the first time sewage came bubbling out of his toilet like it was yesterday. “It was just pumping up through there,” Byrd says. “One of the bathrooms was so full of waste, at least 4 inches high in there. It smelled just like a hog pen.” He sopped up the murky, foul-smelling water and doused the floor with bleach. But the sewage kept coming. On rainy days, it overflowed from drainage ditches into his yard, carrying wads of toilet paper and human waste. The eight-bedroom home in Cahokia Heights, Illinois, had been a source of pride for Byrd when he first built it in 1996. He spent a lot of time outside, caring for his vegetable garden and watching wildlife wander through the backyard. But trying to stop the sewage backups quickly became his main focus, consuming countless hours and thousands of dollars of his savings. “It was a dream house, until the floods came,” says Byrd, now 67. “That house broke me down.” Read the rest at sciencefriday.com. Transcript for this segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Some paleontologists argue the ancient footprints found in South Korea show flight may have evolved in multiple dinosaur lineages. And, COP16 will tackle questions like who should profit from non-human DNA, and who is responsible for financing critical conservation projects. Do Fossil Prints Show Dinosaur Flight Evolved More Than Once? Researchers studying tracks fossilized in Cretaceous-era lakeshore mud in what is now South Korea argue this week in Proceedings of the National Academy of Sciences that the dinosaur footprints are “indirect evidence of pre-avian aerial behavior” in a tiny microraptor. The tracks, which belong to a sparrow-sized theropod related to Tyrannosaurus rex, are spaced far enough apart to indicate that the tiny dino was moving across the mud very quickly. That speed, the researchers argue, is faster than the animal should have been able to go just by running with its hindlimbs. However, if flapping wings were added into the equation to give a power boost, the spacing might make sense. If the microraptor did, in fact, have flight-capable wings, that would mean that the ability to fly may have evolved in multiple lineages of dinosaurs, not just the descendants of Archaeopteryx we see as modern birds. Other researchers are not convinced of the analysis, arguing that the tracks may not all have come from the same individual at the same time. Jason Dinh, climate editor for Atmos, joins guest host Sophie Bushswick to talk about the debate, and other stories from the week in science, including an archeological find of medieval-era Silk Road cities in the Uzbek mountains, breathing differences in people born with the inability to smell, and the surprising ability of hornets to hold their liquor. Biodiversity’s Biggest Event Is Underway In Colombia From now until November 1, bureaucrats from nearly every country in the world will be gathered in Cali, Colombia, for COP16, better known as the United Nations biodiversity summit. This “conference of the parties” comes together about every two years to deliberate on the biggest issue in conservation science: how to stop ecological collapse. At the last summit, COP15, nearly every country agreed to a deal to halt biodiversity loss by 2030. This year’s conference will take a temperature check on how nations are doing in their quest to meet this goal (spoiler alert: not well). Also on the agenda are the questions of who should profit from non-human DNA, and how a $700 billion funding gap for conservation work can be filled. Joining guest host Sophie Bushwick to parse through these big ideas is Benji Jones, environmental correspondent for Vox based in New York. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Throughout history, humans have given a lot of thought to death. We’ve grappled with our mortality, created elaborate burial rituals, and contemplated how best to mourn the loss of a loved one. But what about other animals? How do they understand death? Scientists have begun looking at this question more closely in the last two decades. For example, chimpanzees have a wide variety of responses to death based in part on their relationship with the deceased. Possums put on elaborate displays to fake their own deaths. Ants can tell another ant is dead by the chemicals it omits, but have no concept of what death actually means. SciFri producer Kathleen Davis talks with Dr. Susana Monsó, associate professor of philosophy at the National Distance Education University in Spain and author of Playing Possum: How Animals Understand Death. Transcript for this segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Pregnancy is a hugely transformative experience, both in how it can change someone’s day-to-day life, and how it affects the body. There’s a key part of the body that’s been under-researched in relation to pregnancy: the brain. Those who have been pregnant often talk about “pregnancy brain,” the experience of brain fog or forgetfulness during and after pregnancy. There’s also the specter of postpartum depression, a condition that affects about 1 in 7 women post-birthing. There’s still a dearth of information about what causes these cognitive, psychological, and emotional experiences. In a recent study, scientists took MRI scans of participants before, during, and after pregnancy, and spotted distinctive changes in the brain’s gray and white matter. While these anatomical changes are noticeable, the researchers are still trying to determine what they actually mean for behavior. Joining guest host Kathleen Davis to talk about this study is Dr. Liz Chrastil, associate professor of neurobiology and behavior at the University of California Irvine. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.