Last October, Ira Flatow took a trip to the World Forestry Center in Portland, Oregon, for a daylong exploration of lichen —the fuzzy growths often found on trees, roofs, and gravestones. Ira sat down in front of a sold-out room with Dr. Hannah Prather, postdoctoral researcher and visiting assistant professor of biology at Reed College, and Dr. Jesse Miller, lead botanist for the Washington Natural Heritage Program. From their crucial role in ecosystems as indicators of air quality to their stri...
Jan 09, 2025•31 min•Ep. 941
You’re probably familiar with the concept of handedness—a glove made for your left hand looks basically like the one for your right hand, but won’t fit—it’s a mirror image. Many of life’s important molecules, including proteins and DNA, are chiral, meaning they can exist in either a left-handed or a right-handed form. But on Earth, nature only uses one version or the other in living organisms. Your proteins, for example, are all the left-handed version, while your DNA is all right-handed . With ...
Jan 08, 2025•18 min•Ep. 940
Each year, the journalists at the MIT Technology Review publish a list of 10 breakthrough technologies : these are things poised to hit a tipping point, and potentially change the way the world works. Unsurprisingly, artificial intelligence remains a big breakthrough. While 2024 was the year of large learning models, small learning models top Technology Review ’s list this year. These smaller models are more accessible, efficient, and could be better for the climate than their larger counterpart...
Jan 07, 2025•18 min•Ep. 939
This winter marks the 125th year of Audubon’s Christmas Bird Count, in which bird nerds across the Western Hemisphere venture outside to record all the birds they see and hear. Scientists use that data to understand how birds are faring, where they’re moving, and what they’re up to when it’s not breeding season. With 125 years under its belt, the Christmas Bird Count is the longest-running community science program in the world. How do scientists use this data? And what have they learned in thos...
Jan 06, 2025•18 min•Ep. 938
Researchers have projected that by the end of the century, days where snow covers the ground will virtually disappear in the United States, except for in very high mountains like the Rockies. This would affect entire ecosystems, disrupting animals and plants that live beneath the snow and increasing flooding and runoff . Ira talks with Sophie Bushwick, senior news editor at New Scientist , about the latest snow projections and other top science news of the week, including the discovery of an anc...
Jan 03, 2025•13 min•Ep. 937
Few living scientists are as iconic as Dr. Jane Goodall. The legendary primatologist spent decades working with chimpanzees in Tanzania’s Gombe National Park. More recently, Goodall has devoted her time to advocating for conservation , not just in Africa, but worldwide. Ira spoke with Goodall in 2002, after she had published her book The Ten Trusts: What We Must Do to Care for the Animals , and an IMAX film about her work with chimpanzees had just been released. Transcripts for each segment will...
Dec 31, 2024•30 min•Ep. 936
Today, we’re taking time to reflect on all that 2024 brought us in the world of science, from the total solar eclipse in April to the demise of the Ingenuity helicopter on Mars and the rise of the blockbuster GLP-1 weight-loss medications. SciFri producers Kathleen Davis and Charles Bergquist join Ira to wrap up the year in science, in a conversation recorded in a live event at WNYC’s Greene Space. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe...
Dec 30, 2024•19 min•Ep. 935
It’s been an exciting and hectic year in science discovery and innovation. We’ve reported on stories from across many fields of science—from city climate plans and panda conservation to AI energy consumption and the spread of bird flu. Earlier this month, Ira sat down in front of a live audience at The Greene Space in New York City with Drs. Céline Gounder, Jackie Faherty, and Kevin Reed, three researchers from different areas of science. Together, they reflected on the most exciting discoveries...
Dec 27, 2024•49 min•Ep. 934
What makes three very different conservation projects so successful? These experts say it’s getting the community involved. And, archaeologists make a case for tracking and preserving artifacts left on Mars to chronicle humans’ first attempts at interplanetary exploration. Meet 3 Leaders Addressing Local Conservation Problems While 2024 saw a lot of governments and institutions falling short on climate goals, there were also smaller, localized efforts making a big difference for the environment ...
Dec 26, 2024•18 min•Ep. 933
To wrap up 2024, science writer Riley Black shares her favorite paleontology discoveries of the year. And, if treated properly, even old-fashioned eggnog made with cream and raw eggs can be a safe holiday beverage. The Most Exciting Dino Discoveries Of 2024 December is, traditionally, a time to reflect on the events of the past year—including dinosaur discoveries. In 2024, researchers learned more about T. rex and the spiky tails of stegosaurs as well as how dinosaurs evolved, lived, and more. F...
Dec 25, 2024•19 min•Ep. 932
On December 24, NASA’s Parker Solar Probe will make the closest-ever approach to the sun by a spacecraft. Parker has made more than 20 close approaches to the sun before, but this one will swoop in even closer than 3.8 million miles away from the sun’s surface. Since the probe was launched back in 2018, it’s helped scientists better understand our star and unravel mysteries about solar wind , high-energy solar particles, the sun’s corona and more. Scientists hope that this upcoming approach will...
Dec 24, 2024•18 min•Ep. 931
For its 10th anniversary, the science advisor for “Interstellar” discusses the film’s impact and how new information about gravitational waves could have changed it. The science fiction film “ Interstellar ” turns 10 years old this month. For many of us, it was our first encounter with some pretty advanced astrophysics, taking sci-fi concepts like wormholes and time warping, and backing them up with actual science. Now, we’re revisiting the impact that movie’s science had on pop culture, and how...
Dec 23, 2024•19 min•Ep. 930
Officials say the invasive Asian giant hornet, with its menacing nickname, has been eradicated from the United States. Also, with drone sightings in the news, we take a look at the current laws and regulations around hobby and commercial drone operation. Farewell, Murder Hornet, We Hardly Knew You Over the past few years many words have been written about an invasive insect known casually as the “ murder hornet ”—more formally, the Asian giant hornet, or northern giant hornet. But this week, the...
Dec 20, 2024•27 min•Ep. 929
A program trains women as tactile medical examiners to identify tumors before they show up on imaging scans. And, in a materials science discovery, scientists made a liquid silk solution that hardens and picks up objects—not unlike Spider-Man’s web. How Blind Women In India Are Detecting Early Breast Cancer Breast cancer is the second most common cancer worldwide, just behind lung cancer. And the earlier a breast tumor is found, the more likely it is that the person survives their diagnosis. An ...
Dec 19, 2024•18 min•Ep. 928
Sitting is a big part of modern life. Many people work at a desk all day, have long commutes, or at least enjoy some time relaxing on the couch at the end of the day. But sitting has gained a reputation as being bad for us—with some going so far as to call it “the new smoking.” A recent study in the journal PLOS One sheds more light on just how much sitting is too much , using a cohort of more than 1,000 young adults, including 730 twins. The results showed that sitting for more than about eight...
Dec 18, 2024•19 min•Ep. 927
The Accidental Discovery That Gave Us ‘Forever Chemicals’ When it comes to PFAS chemicals—known as “forever chemicals”—we often hear that they’re used in nonstick coatings, flame retardants, and stain repellants. But those examples can hide the truth of just how widespread their use has been in modern life. A new season of the “Hazard NJ” podcast looks at the origin story of PFAS chemicals , and the accidental discovery of PTFE—aka Teflon—in a DuPont laboratory in southern New Jersey. “Hazard NJ...
Dec 17, 2024•20 min•Ep. 926
“The Burning Earth” examines over 800 years of history to demonstrate how violence against people and the planet are one and the same. Also, the host of the “Hazard NJ” podcast talks about the origins of PFAS “forever chemicals” and their impact on New Jersey residents. How Empire and Environmental Destruction Go Hand-In-Hand A new book called The Burning Earth: A History takes on a massive question: How did we get here? “Here” being this point in environmental history and decades deep into the ...
Dec 16, 2024•19 min•Ep. 925
The effect, known as the Hubble Tension, has been confirmed by James Webb Space Telescope observations. Also, despite near daily warnings of food recalls, 2024 hasn’t been that different from previous years. The Universe Is Expanding Faster Than Expected There’s still a lot to be learned about the physics of our universe—and one of the most perplexing ideas is something called the Hubble Tension . That’s an observation, made around a decade ago, that the universe seems to be expanding faster tha...
Dec 13, 2024•26 min•Ep. 924
The microbiome, the network of tens of trillions of microbes that live in and on our bodies, helps us digest food and protects us from diseases. And depending on what species of bacteria you have, your microbiome could impact your stress response, decision-making, and how likely you are to develop arthritis and depression. Scientists have known that your microbiome is partially shaped by your environment , and the people you spend your time with. But they haven’t had a lot of clarity on how exac...
Dec 12, 2024•17 min•Ep. 923
When you consider someone’s legacy in science, you might think about their biggest discovery, their list of publications, or their titles, awards, and prizes. But another kind of scientific legacy involves the students and colleagues that passed through a scientist’s orbit over the course of a career. A new book, The Elements of Marie Curie: How the Glow of Radium Lit a Path for Women in Science , takes a look at the legacy of Madame Marie Curie, one of the most recognizable names in science his...
Dec 11, 2024•19 min•Ep. 922
There are a lot of holiday gatherings at this time of year, and families getting together can mean that kids are in places that don’t normally have a lot of kid visitors. And, as we know, curious kids can get into trouble. Dr. Sing-Yi Feng, a pediatric emergency physician and medical toxicologist with the North Texas Poison Center, joins Ira to talk about some of the most common toxic exposures seen in hospital emergency rooms over the holidays. She stresses that even more than protecting agains...
Dec 10, 2024•18 min•Ep. 921
It’s that time of the year when you’re making your list, checking it twice, for gifts that spark a love of science for the kids in your life. Ira talks with Mahnaz Dar, young readers’ editor at Kirkus Reviews and Carrie Wolfson, collection development librarian at the Boulder Public Library to round up some of the top kids’ science books of 2024 and make recommendations based on listener questions. See their full list of recommendations on sciencefriday.com. Transcripts for each segment will be ...
Dec 09, 2024•19 min•Ep. 920
The Supreme Court hears a case centering on the FDA’s denial of applications for nicotine-based vapes containing flavored liquid seen as addictive for young people. And, damaged lithium-ion batteries can cause deadly explosions. An algorithm could help detect when they’re about to happen. Supreme Court Hears Case On FDA Regulation Of Flavored Vapes On Monday, the US Supreme Court heard arguments in a case that could change the Food and Drug Administration’s power to regulate nicotine-based vapes...
Dec 06, 2024•26 min•Ep. 919
The Ig Nobel awards are a salute to achievements that, in the words of the organizers, “make people laugh, then think.” Each year, the editors of the science humor magazine Annals of Improbable Research choose 10 lucky(?) winners who have unusual achievements in science, medicine, and other fields. This year’s awards were presented in a theatrical extravaganza in an MIT lecture hall in September. They included awards for studying coin flipping (including hundreds of thousands of real coin flips)...
Dec 05, 2024•49 min•Ep. 918
As part of Science Friday’s 33rd anniversary show, we’re revisiting our listeners’ favorite stories, including this one from 2009. In the album “ Here Comes Science,” the band They Might Be Giants tackled the scientific process, plasma physics, the role of blood in the body, and the importance of DNA, all in song. Band members John Linnell and John Flansburgh discuss the album and play some science tunes. The transcript for this segment is available at sciencefriday.com . Subscribe to this podca...
Dec 04, 2024•27 min•Ep. 917
As part of Science Friday’s 33rd anniversary show, we’re revisiting our listeners’ favorite stories, including this one from 2022. 66 million years ago, a massive asteroid hit what we know today as the Yucatán Peninsula of Mexico. Many people have a general idea of what happened next: The age of the dinosaurs was brought to a close , making room for mammals like us to thrive. But fewer people know what happened in the days, weeks, and years after impact. Increased research on fossils and geologi...
Dec 03, 2024•19 min•Ep. 916
In 2022, the Nobel Prize in Chemistry went to Dr. Carolyn Bertozzi of Stanford University, Dr. Morten Meldal of the University of Copenhagen, and Dr. K. Barry Sharpless of the Scripps Research Institute “for the development of click chemistry and bioorthogonal chemistry .” In “click chemistry,” molecular building blocks snap together quickly and efficiently to let chemists build more complicated molecules. But bioorthogonal chemistry takes that work one step further, allowing the technique to be...
Dec 02, 2024•19 min•Ep. 915
In 2018, actor, author and science communicator Alan Alda spoke publicly about his diagnosis for Parkinson’s Disease. Alda, who is best known for his role in “M*A*S*H,” “The Aviator,” and “The West Wing,” shifted his interests to science communication in his later years. He’s written several books on the topic, and has an ongoing podcast, “Clear + Vivid.” As part of Science Friday’s 33rd anniversary show, we’re revisiting our listeners’ favorite stories, including this one. Alda came on Science ...
Nov 29, 2024•12 min•Ep. 914
Just in time for Thanksgiving, a potato researcher explains potato varieties, potato nutrition, and some tubular tuber facts. And, irregular, fatty marbling gives meat a unique texture. Recreating that in plant-based products isn’t easy. A Horn Of Potato Plenty The potato is a versatile vegetable—baked, roasted, fried, mashed—it can bring something to just about any menu. But, how exactly do these tasty tubers end up on our tables? We’ll give you a crash course in potato science , including how ...
Nov 28, 2024•19 min•Ep. 913
We recently asked our listeners which dubious health claims they’ve been seeing in their social media feeds or being circulated by friends and family. Unsurprisingly, we received a ton of questions about nutrition , including: Is seed oil bad for you? Does apple cider vinegar really lower blood sugar? What is the difference between processed and ultraprocessed foods? To answer those questions and more, SciFri producer Kathleen Davis talks with RDN Jessica Clifford, a nutrition specialist at Depa...
Nov 27, 2024•18 min•Ep. 912
