What are the key takeaways from this Radiolab episode?

Key insights include: **Infant tissue value in research:** Infant eyes and organs carry significantly higher research value than adult donations because infant cells retain regenerative properties. Harvard ophthalmologist Dr. James Ziske confirmed that Thomas's corneal cells remained viable and in active use approximately two years post-donation — a lifespan that makes infant donations exceptionally rare and sought after by researchers.; **Epigenetic research from twin donations:** When one identical twin has anencephaly and the other does not, their cord blood creates a near-perfect control study. Duke University researchers comparing Thomas and Callum Gray's blood identified roughly 1,000 epigenetic differences — variations in gene regulation rather than gene sequence — that may help explain how anencephaly develops in utero.; **Donor family outreach as a viable process:** Families who donate organs can proactively contact receiving research institutions directly, even without formal channels. Sarah Gray cold-called Schepens Eye Research Institute in Boston, requested a 10-minute tour during a lunch break, and was granted access — establishing a replicable model for families seeking closure and researchers seeking human context.

What did Sarah Gray and Ross Gray discuss on Radiolab?

Sarah and Ross Gray donate the organs and tissue of their son Thomas, who lived 60 days after being born with anencephaly in 2010, then spend two years tracking down five research labs across Boston, Durham, Philadelphia, and Richmond to learn exactly how his corneas, liver, retina, and cord blood contributed to active medical studies. Key topics include: **Infant tissue value in research:** Infant eyes and organs carry significantly higher research value than adult donations because infant cells retain regenerative properties. Harvard ophthalmologist Dr. James Ziske confirmed that Thomas's corneal cells remained viable and in active use approximately two years post-donation — a lifespan that makes infant donations exceptionally rare and sought after by researchers.; **Epigenetic research from twin donations:** When one identical twin has anencephaly and the other does not, their cord blood creates a near-perfect control study. Duke University researchers comparing Thomas and Callum Gray's blood identified roughly 1,000 epigenetic differences — variations in gene regulation rather than gene sequence — that may help explain how anencephaly develops in utero..

How long is this episode of Radiolab?

This episode is 27 minutes long. SignalCast provides an AI-generated summary so you can get the key insights in about 3 minutes.

Radiolab

Gray's Donation

February 20, 2026

27 min episode · 2 min read

Sarah Gray,Ross Gray

Episode

27 min

Read time

2 min

Topics

Relationships, Psychology & Behavior, Science & Discovery

AI-Generated Summary

Published Feb 20, 2026

Key Takeaways

✓Infant tissue value in research: Infant eyes and organs carry significantly higher research value than adult donations because infant cells retain regenerative properties. Harvard ophthalmologist Dr. James Ziske confirmed that Thomas's corneal cells remained viable and in active use approximately two years post-donation — a lifespan that makes infant donations exceptionally rare and sought after by researchers.
✓Epigenetic research from twin donations: When one identical twin has anencephaly and the other does not, their cord blood creates a near-perfect control study. Duke University researchers comparing Thomas and Callum Gray's blood identified roughly 1,000 epigenetic differences — variations in gene regulation rather than gene sequence — that may help explain how anencephaly develops in utero.
✓Donor family outreach as a viable process: Families who donate organs can proactively contact receiving research institutions directly, even without formal channels. Sarah Gray cold-called Schepens Eye Research Institute in Boston, requested a 10-minute tour during a lunch break, and was granted access — establishing a replicable model for families seeking closure and researchers seeking human context.
✓Bruised or damaged organs still yield research value: Thomas's liver arrived at CytoNet in Durham too bruised for injection into a transplant patient, but researchers used it to determine the optimal freezing temperature for infant liver cells: negative 150 degrees Celsius. Families should know that even compromised donations can produce concrete, publishable scientific findings rather than going unused.
✓Researcher guilt as a barrier to donor-scientist connection: Dr. Arupa Ganguly at University of Pennsylvania described experiencing guilt each time a pediatric retina sample arrived, feeling complicit in the child's death by needing it. Direct contact with donor families — as Sarah initiated — reframed this dynamic, with Sarah explicitly telling Ganguly that unused tissue would simply have been buried.

What It Covers

Sarah and Ross Gray donate the organs and tissue of their son Thomas, who lived 60 days after being born with anencephaly in 2010, then spend two years tracking down five research labs across Boston, Durham, Philadelphia, and Richmond to learn exactly how his corneas, liver, retina, and cord blood contributed to active medical studies.

Key Questions Answered

•Infant tissue value in research: Infant eyes and organs carry significantly higher research value than adult donations because infant cells retain regenerative properties. Harvard ophthalmologist Dr. James Ziske confirmed that Thomas's corneal cells remained viable and in active use approximately two years post-donation — a lifespan that makes infant donations exceptionally rare and sought after by researchers.
•Epigenetic research from twin donations: When one identical twin has anencephaly and the other does not, their cord blood creates a near-perfect control study. Duke University researchers comparing Thomas and Callum Gray's blood identified roughly 1,000 epigenetic differences — variations in gene regulation rather than gene sequence — that may help explain how anencephaly develops in utero.
•Donor family outreach as a viable process: Families who donate organs can proactively contact receiving research institutions directly, even without formal channels. Sarah Gray cold-called Schepens Eye Research Institute in Boston, requested a 10-minute tour during a lunch break, and was granted access — establishing a replicable model for families seeking closure and researchers seeking human context.
•Bruised or damaged organs still yield research value: Thomas's liver arrived at CytoNet in Durham too bruised for injection into a transplant patient, but researchers used it to determine the optimal freezing temperature for infant liver cells: negative 150 degrees Celsius. Families should know that even compromised donations can produce concrete, publishable scientific findings rather than going unused.
•Researcher guilt as a barrier to donor-scientist connection: Dr. Arupa Ganguly at University of Pennsylvania described experiencing guilt each time a pediatric retina sample arrived, feeling complicit in the child's death by needing it. Direct contact with donor families — as Sarah initiated — reframed this dynamic, with Sarah explicitly telling Ganguly that unused tissue would simply have been buried.

Notable Moment

When Sarah visited Dr. Ziske's Harvard lab unannounced during a lunch break, he set down his food and told her that infant eyes are worth their weight in gold to researchers — and that Thomas's cells were likely still being actively used two full years after his death.

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Episode Transcript

Hey. This is Radio Lab. I'm Latif Nassar. And today, we have a story for you that gets at the satisfaction of knowing. There are lots of moments in life when you are a piece of someone's story, just a little part of it for a moment, and you never get to see how that story shakes out or what impact you actually had. This story starts out like that. A family puts something out into the void, something very meaningful to them without any expectation that they will ever hear back about it. But then they decide, actually, wait a second. We do wanna know what came out of that. And so they go on a quest to find out. It's an episode we originally released in 2015, and we've got a little update for you at the end. I should say at the top, this episode discusses medical issues with a pregnancy, if that is a sensitive topic for you. Either way, I I think it's one of the most profound episodes we've ever put out at this show. Here it is, Grey's donation. Yep. You're wait. Wait. You're listening. K. Alright. K. Alright. You're listening to RadioLab. RadioLab. From WNYC. WNYC. Yep. Rewind. Hi. This is Jed. Hi. Hey. It's me, Jed. And I'm Robert. And today's story started when we bumped into an article, in the Philadelphia Inquirer. Were you a little bit, weirded as to why we are calling you? Yes. I know, you know what I mean? I I just don't understand the whole thing. The story really gets going with a phone call to this woman, Elizabeth Mason. I'm a receptionist slash switchboard operator. She works at a research lab in Boston. And one day, she's sitting in her desk and she gets a call from a woman who says that she has donated some eyes to them and she wants to know what happened to them. This is not a call you get every day. I just remember it was just very unusual. Right? And just I didn't know what to do with it. I just felt like I gotta find somebody to help this woman. Today, we're gonna tell you the story of the of the woman on the other end of that phone call. This is her story. You might tell you their story. So for my title, should I say, I'm Sarah Gray. I'm the mom. I'm Ross Gray. I'm Thomas's dad. And how did you guys meet while we're We met in a bar in Glasgow. Really? Yeah. I was on vacation with a girlfriend. And, and was it a was it a was it, what what what happened? Without getting into too many. I don't know. I think we've got different ideas and different recollection of what happened. But Well, he started dating across the ocean for a year and a half, and then he moved to America. Five days after he arrived, they were married. A …

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