Science Friday

All the pups we love—from chihuahuas to great danes—are descendants of the mighty gray wolf. But how did we end up with so many breeds? The story that's often told is that dog diversity really took off with the Victorians in the 1800s, but new research is unleashing a different tale. Host Flora Lichtman talks with bioarchaeologist Carly Ameen about the diversification of dogs. 

Plus, a long-running experiment to tame silver foxes is...

We keep hearing that these are unprecedented times for science: scientific skeptics running federal agencies, growing mistrust of vaccines, and messaging from the highest levels of government that scientists are in the pocket of industry. 

To understand how unique this time really is, we’re talking to Naomi Oreskes, a science historian who has spent her career studying skepticism in science. She joins Host Flora Lichtman to discuss ...

In a speech last week in a speech at the World Economic Forum, President Trump said China was making a lot of wind turbines, but not using much wind power in their own country. Is that right? 

China studies professor Jeremy Wallace joins Host Ira Flatow to talk about the renewable energy landscape in China. They’ll dig into how China is flooding the world with affordable solar technology, making it the cheapest form of electricity i...

Forty years ago this week, the space shuttle Challenger exploded in flight, 73 seconds after liftoff from Cape Canaveral. All seven crew members were killed. In the months that followed, the tragedy was traced to a failed O-ring in one of the shuttle’s rocket boosters. Now, with the Artemis II mission preparing for launch to lunar orbit, what have we learned about spaceflight and risk? 

Former astronaut Jim Wetherbee joins Host Ira ...

A rogue strain of flu, subclade K, has sickened more than 19 million people in the US so far this season. And the flu shot hasn’t offered that much protection. What’s going on with this superflustorm?

Joining Host Flora Lichtman with some answers is Jennifer Duchon, a pediatric infectious disease specialist.

Guest: Dr. Jennifer Duchon is a pediatric infectious disease specialist at Mount Sinai Hospital in New York.

Transcripts for eac...

This time last year, Los Angeles was on fire, and more than 16,000 homes and buildings burned to the ground. Cars, batteries, solar panels, insulation, and cleaning supplies went up in flames, releasing chemicals like lead, benzene, and asbestos into giant smoke plumes that wafted across the city.

A year later, scientists are trying to understand the fallout of this urban wildfire—what chemicals got left behind, how to remediate the...

Deepfakes have been everywhere lately, from fake AI images of Venezuelan leader Nicolás Maduro following his (real) capture by the United States, to X’s Grok AI generating nonconsensual images of real people in states of undress. And if you missed all that, you've almost certainly had your own deepfake close encounter in your feed: maybe rabbits bouncing on a trampoline or an unlikely animal friendship that seems a little too good ...

When it comes to “bad” cholesterol, most cardiologists say lower is better. But what’s the best way to get that number down? Can diet and exercise alone do the job?

Cardiologists Kiran Musunuru and Neha Pagidipati join Host Ira Flatow for a look at the latest in cholesterol-lowering treatments, including CRISPR technology that could turn off cholesterol-making genes for life. How does it work, and is it safe?

Guests:
Dr. Kiran Musunur...

An Associated Press investigation found that more than 420 “anti-science” bills were introduced in statehouses last year, targeting protections around public health issues like vaccines, milk safety, and fluoride. As state legislatures come back into session, what can we expect for 2026? Joining Ira Flatow is Laura Ungar, science and medical reporter for the Associated Press.

Plus, reporter Elise Plunk joins Host Flora Lichtman to d...

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 slippery science of ice.

Guest: Dr. Robert...

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 about why Parkinson’s starts and how...

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, listener Leon called us with a quest...

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 improve our concrete today. Concrete ...

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: Dr. Sudip Parikh is CEO and Executive ...

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 Miskimins joins Host Ira Flatow to dr...

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 year. Host Flora Lichtman speaks with...

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 and animal domestication expert Raff...

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 PRX, embedded with this group to und...

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 asteroid Psyche. Elkins-Tanton tells...