Science Friday

Human childbirth is often difficult and incredibly painful—just ask anyone who’s been through it. And for a long time, childbirth seemed to be uniquely difficult for humans. But a new study suggests that we aren’t alone: Some small primates birth offspring whose heads are nearly twice the size of the mother’s pelvic area.  

So how do those primates go through difficult childbirths? Why didn’t evolution make ours any easier? And what can this tell us about humankind? Flora explores these questions and more with anthropologist Lia Betti.

Guest:

Dr. Lia Betti is an associate professor of anthropology at University College London in the UK.

Transcripts for each episode are available within 1-3 days at sciencefriday.com.

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Former Interior Secretary Deb Haaland, a member of the Laguna Pueblo tribe, was the first Native person to hold a cabinet position. Now she’s running to be governor of New Mexico. 

Haaland joins Host Flora Lichtman to talk about her new memoir, “A Voice Like Mine,” her time at the Interior Department, and why she thinks lawsuits are a good thing when it comes to the environment. 

Read an excerpt from “A Voice Like Mine.”

Guest:

Deb Haaland served as Secretary of the Interior under President Biden. She is a member of Laguna Pueblo tribe and lives in Albuquerque, New Mexico.

Transcripts for each episode are available within 1-3 days at sciencefriday.com.

Subscribe to this podcast. Follow our show on Instagram, TikTok, Facebook, and Bluesky @scifri and sign up for our newsletters. Got a science question that’s keeping you up at night? Call us: 877-472-4374

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Keeping your butt in a seat for hours a day increases the risk of heart attacks, diabetes, psychiatric conditions, and more. But in our tech-filled world, many of us lead sedentary lives, whether because of school, work, or leisure. Researchers set up an experiment to see how much movement would make a difference for people who spend their days at a desk—and 23,000 people signed up.

Joining Flora to tell us what they found is tech journalist Manoush Zomorodi, author of “Body Electric: The Hidden Health Costs of the Digital Age and New Science to Reclaim Your Well-Being.”

Read an excerpt of “Body Electric.”

Guest: 

Manoush Zomorodi is host of NPR’s TED Radio Hour and author of “Body Electric: The Hidden Health Costs of the Digital Age and New Science to Reclaim Your Well-Being.”

Other episodes you may enjoy:

8.5 Hours Of Daily Sitting Linked To Higher BMI And Cholesterol

How Is Screen Time Affecting My Kid?

The transcript for this episode is available at sciencefriday.com.

Subscribe to this podcast. Follow our show on Instagram, TikTok, Facebook, and Bluesky @scifri and sign up for our newsletters. Got a science question that’s keeping you up at night? Call us: 877-472-4374

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Dr. Masao Tomonaga was only 2 years old when the United States bombed his home city of Nagasaki. He survived, and grew up to become a physician for other survivors, known as hibakusha. He also studied hematology, and his research on leukemia and myelodysplastic syndromes was foundational for understanding how radiation affects the body. 

In August 2025, the 80th anniversary of the bombings of Hiroshima and Nagasaki, he spoke with Host Ira Flatow about his life’s work, how hibakusha lived with the medical consequences of the bombs, and his message to the world.

Guest: 

Dr. Masao Tomonaga is a survivor of the atomic bombing of Nagasaki and director emeritus of the Japanese Red Cross Nagasaki Atomic Bomb Hospital.

Other episodes you may enjoy:

House Stalls On Bill To Compensate Victims Of Nuclear Testing

Revisiting The Nuclear Age With ‘Oppenheimer’

The transcript for this episode is available at sciencefriday.com.

Subscribe to this podcast. Follow our show on Instagram, TikTok, Facebook, and Bluesky @scifri and sign up for our newsletters. Got a science question that’s keeping you up at night? Call us: 877-472-4374

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Imagine you wanted to get a general idea of what people are eating in a given community. You could look at grocery store sales, or do surveys, but neither can capture a complete picture. 

Microbiome researcher Lawrence David and his lab look to another source of data: genetic material in sewage water. It turns out that detectable DNA signatures of individual plant and animal species remain behind even after they’ve been eaten, digested, excreted, and flushed down the toilet. He joins Host Flora Lichtman to describe his “Edible Atlas” project, the backend limitations of sewage analysis, and where the research might go. 

Guest: 

Dr. Lawrence David is an associate professor of molecular genetics and microbiology in the Center for Genomics and Computational Biology. He runs the Edible Atlas project at Duke University.

Other episodes you may enjoy:

You Share Your Gut Microbiome With Your Friends

Dirty Diapers Reveal How Germy Babies’ Microbiomes Are

The transcript for this episode is available at sciencefriday.com.

Subscribe to this podcast. Follow our show on Instagram, TikTok, Facebook, and Bluesky @scifri and sign up for our newsletters. Got a science question that’s keeping you up at night? Call us: 877-472-4374

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.