DNA is the gold standard of identification. Except when it’s not. In rare cases when a person has two complete sets of DNA, that person’s identity may be up in the air. Meanwhile, DNA ancestry tests are proving frustratingly vague: dishing up generalities about where you came from rather than anything specific. And decoding a genome is still relatively expensive and time-consuming. So, while we refine our ability to work with DNA, the search is on for a quick and easy biomarker test to tell us who we are. 
In this hour: the story of chimeras – people who have two sets of DNA; a reporter whose ancestry tests revealed she is related to Napoleon and Marie Antoinette; and the eyes have it in Somaliland, the first nation to use iris scans in an election. Find out why your irises may be what ultimately distinguishes you from the crowd.
Guests:


Tina Hesman Saey – Senior writer covering molecular biology for Science News, including a series on genetic testing.


Carl Zimmer – Columnist for The New York Times, author of, “She Has Her Mother’s Laugh: The Powers, Perversions, and Potential of Heredity.”


Kevin Bowyer – Professor of computer science and engineering, University of Notre Dame.

 
Originally aired July 23, 2018
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Identity Crisis (rebroadcast)

The surprising connections in science and technology that give you the Big Picture. Astronomer Seth Shostak and science journalist Molly Bentley are joined each week by leading researchers, techies, and journalists to provide a smart and humorous take on science. Our regular "Skeptic Check" episodes cast a critical eye on pseudoscience.

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Birds have it going on. Many of these winged dinosaurs delight us with their song and brilliant plumage. Migratory birds travel thousands of miles in a display of endurance that would make an Olympic athlete gasp.
We inquire about these daunting migrations and how birds can fly for days without rest. And what can we do to save disappearing species? Will digital tracking technology help? Plus, how 19th century bird-lovers, appalled by feathered hats, started the modern conservation movement.
Guests:
Scott Weidensaul – Ornithologist and naturalist and author of “A World on the Wing: the Global Odyssey of Migratory Birds.”
Kassandra Ford – Doctoral candidate in evolutionary biology at the University of Louisiana at Lafayette.
Michelle Nijhuis – Science journalist and author of “Beloved Beasts: Fighting for Life in an Age of Extinction.”
Originally aired May 10, 2021
Featuring music by Dewey Dellay and Jun Miyake
You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!
Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.
 
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For the Birds*

The zombie eco-thriller “The Last of Us” has alerted us to the threats posed by fungi. But the show is not entirely science fiction. Our vulnerability to pathogenic fungi is more real than many people imagine. 
Find out what human activity drives global fungal threats, including their menace to food crops and many other species. Our high body temperature has long kept lethal fungi in check; but will climate change cause fungi to adapt to warmer temperatures and threaten our health? 
Plus, a radically new way to think about these organisms, how they make all life possible, and how we might find balance again.
Guests:
Emily Monosson – Toxicologist who writes about changes in the natural world. A member of the Ronin Institute and a professor at the University of Massachusetts, Amherst, she is the author of “Blight: Fungi and the Coming Pandemic.”
Arturo Casadevall – Microbiologist, immunologist, professor of medicine at Johns Hopkins School of Medicine.
Michael Hathaway – Anthropologist, director of the Asian Studies Center at Simon Fraser University in Vancouver, Canada, and author of “What a Mushroom Lives For.”
 *originally aired February 13, 2023
Big Picture Science is part of the Airwave Media podcast network. Please contact sales@advertisecast.com to inquire about advertising on Big Picture Science.
You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!
 
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Fungi Fear*

Drinking a cup of coffee is how billions of people wake up every morning. But climate change is threatening this popular beverage. Over 60% of the world’s coffee species are at risk of extinction. Scientists are searching for solutions, including hunting for wild, forgotten coffee species that are more resilient to our shifting climate. Find out how the chemistry of coffee can help us brew coffee alternatives, and how coffee grounds can be part of building a sustainable future.
Guests:
Christopher Hendon - Assistant Professor of Computational Materials Chemistry, University of Oregon
Shannon Kilmartin-Lynch - Associate Professor of Civil Engineering, Monash University, Australia
Aaron Davis - Senior Research Leader of Crops and Global Change, Royal Botanical Gardens, Kew
Featuring music by Dewey Dellay and Jun Miyake
You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!
Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.
 
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Coffee of the Future

The Great North American Solar Eclipse will trace a path of shadow across Mexico and 13 U.S. States on April 8th. Phil Plait, also known as The Bad Astronomer, joins the show for an extended interview covering a wide-range of topics, such as his excitement about the eclipse, the Pentagon’s most recent UFO report, and some of the most persistent moon landing conspiracy theories.
Guest:
Phil Plait – aka the Bad Astronomer, former astronomer on Hubble, teacher, lecturer, and debunker of conspiracy theories. He is also the author of a new book “Under Alien Skies: A Sightseer’s Guide to the Universe.”
Featuring music by Dewey Dellay and Jun Miyake
You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!
Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.
 
 
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When the Moon Hits Your Eye

Asteroids are rich in precious metals and other valuable resources. But mining them presents considerable challenges. We discuss these, and consider how these spinning, rocky resources might be the key to a space-faring future. But an economist points out the consequences of bringing material back to Earth, and a scientist raises an ethical question; do we have an obligation to keep the asteroids intact for science?
 Guests:
Jim Bell - Planetary scientist in the School of Earth and Space Exploration at Arizona State University.
Martin Elvis - Astronomer and author of “Asteroids: How Love, Fear, and Greed Will Determine Our Future in Space.”
Ian Lange - Economist and associate professor at the Colorado School of Mines and author of a paper on the feasibility of asteroid mining.
Featuring music by Dewey Dellay and Jun Miyake
You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!
Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.
 
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Identity Crisis (rebroadcast)

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