Science Friday

It’s a wintertime question that you may have had as you struggled down a frozen sidewalk, or strapped on some ice skates: Just why is ice slippery, anyway? It turns out the answer is somewhat complicated. Mechanical engineer Robert Carpick studies tribology, the science of surface interactions, from friction to wear to lubrication. He joins Host Ira Flatow to wrangle some new ideas about the slipp...

Each year, around 90,000 people in the U.S. are diagnosed with Parkinson’s, a neurodegenerative disease that can cause tremors and affect cognition. Scientists are working to identify some of the earliest signs of the disease , and to figure out how we might test for—and treat—Parkinson’s in the future. Neurologists Emily Tamadonfar and Michael Okun join Host Flora Lichtman to discuss what we know...

As we age, our vision gets blurrier, we form cataracts, and we have a higher risk of glaucoma. But Greenland sharks live for hundreds of years and still maintain healthy, functional eyeballs. So what gives? Host Ira Flatow talks with molecular biologist Dorota Skowronska-Krawczyk, who studies the mechanisms of aging, about what we can learn from these fishy eyeballs and how it could help us. Plus,...

The concrete of ancient Rome is famous for its durability. Just look at the Pantheon and those iconic aqueducts that helped transport water throughout the empire—still standing 2,000 years later. But knowledge about how this concrete was made hasn’t been very solid. Well, scientists have discovered a construction site in Pompeii preserved in the volcanic ash, which might hold clues to how we can i...

Last February, Sudip Parikh, CEO of the American Association for the Advancement of Science, issued a dire warning about federal cuts to science, saying the country was on its way to losing its status as a global science leader. Nearly a year later, where does the United States stand with science funding , and what happens next? Sudip Parikh joins Host Flora Lichtman once again to discuss. Guest:...

With President Trump’s moves to take control of Venezuela’s oil production—including the seizure of incoming and outgoing oil tankers—there’s been a lot of talk about the country’s deep reserves of crude. But not all oil is the same, and getting the Venezuelan reserves out of the ground might be neither cheap nor simple. So who wants that oil, and what is it good for? Petroleum engineer Jennifer M...

Growing up, Daisy Hernández was told that her aunt had become ill from eating a bad apple. She watched as her aunt became sicker and sicker, and didn’t learn until years later that she was living with Chagas disease. It affects around 8 million people, mostly across the Americas, and yet many of us have never heard of it. Hernandez’s book, The Kissing Bug, is SciFri’s first book club pick of the y...

What does it mean to be a wild animal in a world dominated by humans? A recent study found that city-dwelling raccoons’ snouts are getting shorter—a sign of domestication. Another study on dark-eyed juncos living on a Los Angeles college campus found that their beaks changed shape during the COVID-19 lockdown, when there wasn’t as much food and trash on campus.  Evolutionary biologist Pamela Yeh a...

A year ago this week, the Eaton and Palisades fires broke out in Los Angeles, and ultimately became one of the most destructive urban fire events in recent history. Today we’ll hear about a community brigade that is taking firefighting into its own hands through a technique called “home hardening.”Journalist Adriana Cargill, host of the new podcast “The Palisades Fire: A Sandcastle Special” from P...

When humans finally land on Mars, what should they do? A new report from the National Academies of Sciences, Engineering, and Medicine lays out the science objectives for a crewed Mars mission . Planetary scientist Lindy Elkins-Tanton, who co-chaired the report committee, joins Host Flora Lichtman to talk about the plans to send people to Mars. We’ll also get an update on the mission to survey the...

Since President Trump returned to office, his administration has been aggressive in rolling back clean energy initiatives. Trump’s “big beautiful bill” ended tax credits for solar panels and electric vehicles. And the EPA is moving to cancel $7 billion dollars in federal grants that were intended to help low- and middle-income families install solar on their homes. But that isn’t the whole story....

‘Tis the season for exercise resolutions. For a select few, an ultramarathon—a race of 50, 100, or even more miles—may be on the table for 2026. But is there a limit to what our bodies can endure? And what makes ultramarathoners capable of these tremendous feats?  Joining Host Flora Lichtman are sports medicine expert Brandee Waite and biological anthropologist Andrew Best. Guests: Dr. Brandee Wai...

In the last year, you’ve basically replaced your body weight in new cells. So yes, it’s a new year, new you. To ring in 2026, we’re talking about starting anew, and drawing inspiration from tiny worms that embody the ultimate growth mindset—they can regrow a whole body from just a tiny piece of their tail.  In this festive episode, Host Flora Lichtman talks with biologist Alejandro Sánchez Alvarad...

This has been a busy year in science , from government budget cuts and policy changes affecting research, to the record rise of renewables, to the surge in AI, and everything in between. Science journalists Sophie Bushwick and Maggie Koerth join Host Ira Flatow to unpack some of the year’s top stories, and some you might have missed. Guests: Sophie Bushwick is a freelance science journalist and ed...

Being able to belt out a tune like Adele or Pavarotti is not just about raw talent. The best singers in the world have to work on their technique—like how to control their breath and develop the stamina to hit note after note for a two-hour concert. But pop stars and opera singers aren’t the only vocalists who have figured out how to harness their voices for maximum impact. Death metal vocalists a...

Gen Alpha slang can seem unintelligible to adults, but linguist and TikToker Adam Aleksic argues language development in the internet age is worth legitimate study. In a conversation from July, Adam talks to Host Flora Lichtman about how algorithms and social media are changing the way we speak, and discusses his new book, Algospeak: How Social Media is Transforming the Future of Language. Guest:...

What have we learned in recent years about black holes? Can entangled quantum particles really communicate faster than light? What’s the story behind Schrödinger’s Cat? And, in this weird liminal space between the holidays, what even IS time, really?  Physicist Sean Carroll and Host Ira Flatow tackled those big questions and more at a recent event at WNYC’s Greene Space in New York City. Carroll’s...

Health psychologist Dr. Kari Leibowitz traveled to some of the coldest, darkest places on earth to learn how people there don’t just survive, but thrive in winter. She says that one of the key ingredients is adopting a positive wintertime mindset by focusing on and celebrating the good parts of winter. In a conversation from last January, Flora Lichtman talks with Dr. Kari Leibowitz, author of How...

Imagine sitting at home and then all of a sudden you hear a men’s choir belting out “The Star Spangled Banner.” You check your phone, computer, radio. Nothing’s playing. You look outside, no one’s there. That’s what happened to neurologist Bruce Dobkin after he received a cochlear implant. He set out to learn everything he could about the condition, called musical hallucinosis. In a story from Aug...

Koalas with the bodies of lions. Elephants the size of your dog. Gigantic, 8-foot-tall sloths. These aren’t creatures found in science fiction: They walked our planet a million years ago, during the Ice Age. That’s the focus of the third season of the Apple TV series “Prehistoric Planet,” which uses the latest paleontology research and photorealistic CGI to reimagine the lives of ancient creatures...

Since 1955, when Congress passed the Polio Vaccination Assistance Act, the federal government has been in the business of expanding access to vaccines. That is, until this year.2025 has been filled with almost daily news stories about federal agencies, under the direction of Health Secretary Robert F. Kennedy Jr., casting doubts about vaccine safety, including unsubstantiated claims about links to...

This year, comet 3I/Atlas broke into our solar system, but also the zeitgeist. This dirty snowball is a visitor from another solar system, and it’s only the third interstellar object we’ve ever spotted. And today, it's closer to us than ever before—just 170 million miles away. Astronomy experts Stefanie Milam and Hakeem Oluseyi join Host Flora Lichtman to dish about 3I/ATLAS and how it captured th...

While on a sampling trip in California’s Lassen Volcanic National Park, researchers stopped to sample a rather boring stream on their hike to Boiling Springs Lake. But when they incubated that water sample back in the lab, they discovered an amoeba that could still move and divide at 145 F, a new record for a eukaryotic cell. Microbiologist Angela Oliverio joins Host Flora Lichtman to describe the...

Videos of humanoid robots dancing, doing cartwheels, putting clothes in a washing machine, and serving drinks are all over social media. And tech CEOs are telling us to prepare for the forthcoming humanoid army that’s going to totally change our lives for the better. But what’s real? Where are we with this technology? Are these humanoids robots ready to take washing the dishes off our plates, or w...

It’s that time of year: the Christmas Bird Count , when birders go out in flocks to record all the birds they see in a single day. The data collected during this annual tradition gets compiled by the National Audubon Society, and helps scientists understand bird population trends across the Americas.  If you participate in the bird count, chances are you’ll see a lot of the same birds you’d see an...