
Voice
Radiolab
09/26/25
•66m
About
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Over the course of millions of years, human voices have evolved to hold startling power. These clouds of vibrating air carry crucial information about who we are–and we rely on them to push ourselves up and out into the physical world.
This week, we’re on a journey to understand how we got our unique sonic fingerprint, the power it affords us, and what happens when it’s taken away.
Special thanks to Alice Wong, Wren Farrell, Hector Espinal and his parents, Crisaly and Hector Espinal, Mary Croke, Nancy Kielty, Beth McEwen, Robin Feuer Miller, Roomful of Teeth, Amanda Crider, Caroline Shaw, Judd Greenstein, Leilihua Lanzilotti, Rebekka Karijord, and Michael Harrison.
EPISODE CREDITS:
Reported by -Annie McEwen and Matt Kielty
Produced by - Annie McEwen and Matt Kielty
Original music and sound design contributed by - Jeremy Bloom and Matt Kielty
with mixing help from - Jeremy Bloom
Fact-checking by - Anna Pujol-Mazzini
and Edited by - Alex Neason
EPISODE CITATIONS:
Books -
- Disability Intimacy by Alice Wong
- Year of the Tiger by Alice Wong
- This is the Voice by John Colapinto
Websites -
Audio/Artists -
Roomful of Teeth (https://www.roomfulofteeth.org/)
- Partita for 8 Voices written by Caroline Shaw
- AEIOU composed by Judd Greenstein
- On Stochastic Wave behavior by Leilehua Lanzilotti
- Fugue by Rebekka Karijord, taken from the record “The Bell Tower", featuring Roomful of Teeth.
- Just Constellations, composed by Michael Harrison
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Previous Episode

The Spark of Life
September 19, 2025
•36m
In the 1920s, a Russian biologist studying onion roots made a surprising discovery: underground, down in the darkness, it seemed like the cells inside the onion roots were making their own ... light.
The “onion root experiment” went on to become something of a cult classic in science, and eventually the biologically-made light was dubbed “biophotons.” In the ensuing century, biophoton discoveries moved from onion roots to bacteria, frog embryos, and humans. Today, scientist Nirosha Murugan is on a career-defining journey to learn more about the light. As she and her colleagues study this mysterious phenomenon, they find themselves racing from question to question, wondering what gives off light, where it might be coming from, and what, if anything, it could tell us about life, disease, and even death.
Correction: In this episode, when Nirosha spoke about her melanoma study, she misstated the lab animal involved in the study. It was mice.
EPISODE CREDITS:
Hosted by - Molly Webster
Reported by - Molly Webster
Produced by - Sarah Qari
with help from - Molly Webster
Fact-checking by - Natalie Middleton
EPISODE CITATIONS:
Videos -
The “Life Flash” video! Note that fluorescent dye was added to the experiment, by the researchers, to enhance the zinc sparks (https://www.youtube.com/watch?v=b9tmOyrIlYM)
Articles -
The Onion Root Experiment (https://www.brmi.online/gurwitsch)
Enjoy this Wikipedia rabbit-hole about Fritz Albert Popp (https://zpr.io/nxJFcAMvZkBz)
Original Paper on zinc sparks (https://zpr.io/GfbazBqU3e3y) at the time of fertilization, a moment referred to as the “life flash”
Read more about the “death flash,” (https://zpr.io/TqG3mcCGYEgQ) and other end-of-life phenomenon, as reported by medical caregivers
Research from Nirosha’s lab on photon emissions (https://zpr.io/mtpbwSeY4iEp) and brain activity
Research from Nirosha’s lab on biophoton emission (https://zpr.io/3in9LSmzW6m5) and cancer diagnosis
Signup for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (https://radiolab.org/newsletter)!
Radiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today.
Follow our show on Instagram, Twitter and Facebook @radiolab, and share your thoughts with us by emailing radiolab@wnyc.org.
Leadership support for Radiolab’s science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.
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Next Episode

Adoptive Couple v. Baby Girl
October 3, 2025
•45m
This is the story of a three-year-old girl and the highest court in the land. The Supreme Court case Adoptive Couple v. Baby Girl is a legal battle that has entangled a biological father, a heart-broken couple, and the tragic history of Native American children taken from their families. We originally released this story back in 2013, when that girl’s fate was still in the balance of various legal decisions. We thought now was a good time to bring the story back, because the Act at the center of the story is still being questioned.
When then-producer Tim Howard first read about this case, it struck him as a sad but seemingly straightforward custody dispute. But, as he started talking to lawyers and historians and the families involved in the case, it became clear that it was much more than that. Because Adoptive Couple v. Baby Girl challenges parts of the 1978 Indian Child Welfare Act, this case puts one little girl at the center of a storm of legal intricacies, Native American tribal culture, and heart-wrenching personal stakes.
LATERAL CUTS:
What Up Holmes?
The Gatekeeper
EPISODE CREDITS:
Reported by - Tim Howard
Produced by - Tim Howard
EPISODE CITATIONS (so many):
Background and Reporting from a range of different perspectives
- "Couple forced to give up daughter"
An introductory article by Allyson Bird, for the Charleston, SC Post and Courier - "Supreme Court Takes on Indian Child Welfare Act in Baby Veronica Case"
A report for Indian Country Today by Suzette Brewer, who has also written a two-part series on the case. - "Supreme Court hears Indian child custody case"
Tulsa World article by Michael Overall which includes Dusten Brown's account of his break-up with Veronica's mother, and his understanding about his custodial rights. Plus photos of Dusten, Veronica, and Dusten's wife Robin in their Oklahoma home_._ - Randi Kaye's report for CNN on the background of the case, and interviews with Melanie and Matt Capobianco: "Video: Adoption custody battle for Veronica"
- Nina Totenberg’s report for NPR: "Adoption Case Brings Rare Family Law Dispute To High Court"
- Reporting by NPR's Laura Sullivan and Amy Walters on current ICWA violations in South Dakota.
- Dr. Phil's coverage: "Adoption Controversy: Battle over Baby Veronica"
Analysis and Editorials
- Op-ed by Veronica's birth mom, Christy Maldonado, in the Washington Post: "Baby Veronica belongs with her adoptive parents"
- Colorlines report "The Cherokee Nation’s Baby Girl Goes on Trial:"
- Americans remain dangerously uninformed about the basics of tribal sovereignty, and what it means for the relationship between the United States and Native tribes and nations.
- The Weekly Standard's Ethan Epstein argues that ICWA is "being used to tear [families] apart]: "Mistreating Native American Children"
- Andrew Cohen considers the trickier legal aspects of the case for the Atlantic in "Indian Affairs, Adoption, and Race: The Baby Veronica Case Comes to Washington:"
- A little girl is at the heart of a big case at the Supreme Court next week, a racially-tinged fight over Native Ameri...
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