Allergies have been documented in historical records dating as far back as 2,400 years ago, when Hippocrates wrote about “hostile humors” in some people who suffered badly after eating cheese. But why do we experience them to begin with? What even is an allergy? Are allergies on the rise? And why are some mere nuisances, while others are deadly?

This episode is a roundup of allergy stories—from the mundane to the frightful—and a round up of allergy questions we’re asking Dr. Theresa MacPhail, author of Allergic: Our Irritated Bodies in a Changing World, to answer for us.

Featuring Beni Osei Duker, Theresa MacPhail, Dwayne Smith, and Lily Ko.

Produced by Felix Poon. For a transcript and full list of credits, go to outsideinradio.org.

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LINKS

Check out Theresa MacPhail’s book, Allergic: Our Irritated Bodies in a Changing World.

Read up on the different hypotheses on why we get allergies in the first place:

• The parasite hypothesis
• The toxin hypothesis
• The hygiene hypothesis
• The old friends hypothesis

Learn about the history of the EpiPen.

Venom is full of dualities. According to the UN’s World Health Organization, snakebite envenoming causes somewhere between 81,000 and 138,000 deaths per year, and even that is likely an undercount. Yet research into venom has yielded treatments for diabetes, cancer, erectile dysfunction, and even the celebrity favorite diabetes slash diet drug, Ozempic.

In this episode, we explore the world of venom, where fear and fascination go hand-in-hand, and the potential for healing comes with deadly stakes.

This is part II of our “Things That Can Kill You” miniseries, which also explores poison and allergies.

Featuring Sakthi Vaiyapuri. Thanks to Iva Tatić for her question.

Produced by Justine Paradis. For full credits and transcript, visit outsideinradio.org.

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LINKS

Here’s more on Sakthi Vaiyapuri’s community awareness programs in India and his team’s research on the socioeconomic impacts on rural populations in Tamil Nadu

The UN’s World Health Organization’s fact sheet on snake envenoming as a high-priority neglected tropical disease

A great breakdown on why snakebite deaths are undercounted and the problem of missing data, written by global health researcher Saloni Dattani on Substack

A Nature article on potential advances in antivenom

Check out this Science Friday film on the cool research on cone snails and the non-opoiod painkillers derived from their venom.

More on Ozempic and lots of other innovations with roots in venom research (New York Times)

A few months ago we got an email from a listener who tried a bit of a very poisonous apple and lived to tell the tale. Ultimately, he was fine, but the incident left him full of questions.

We figured, why not run with that curiosity? We put a call out for all of your poison related queries and you delivered: How much should you worry about those green potatoes in your pantry? Could our car tires be poisoning the environment? It’s another Outside/Inbox roundup on the show this week. Buckle up.

This is the first part of a “Things That Can Kill You” mini-series. Up next we tackle venom and allergies.

Featuring Hussein Elgridly, Deborah Blum, Andy Robinson, Angela Mech, Kyle Lombard and Heejung Jung.

1. Are green potatoes toxic?
2. Are invasive browntail moths expanding their range?
3. Is hydroxyapatite an effective substitute for fluoride?
4. How much toxic airborne pollution is contributed by vehicle tires?

For our next Outside/Inbox roundup, we’re looking for questions about sound! Dream big here: we’re talking animal sounds, traffic noise, the sounds of space… Send us your questions by recording yourself on a voice memo, and emailing that to us at outsidein@nhpr.org. Or you can call our hotline: 844-GO-OTTER.

For full credits and transcript, visit outsideinradio.org.

Sgt. Tibbs, a fluffy, 19-year-old Maine Coon with tiger stripes, soft eyes, and a chipped tooth, is missing on the streets of Manchester, New Hampshire. His owner, Rose, fears the worst. But when she finds out her cat was never missing at all – the truth turns out to be worse than she feared.

From our friends over at the Document team at New Hampshire Public Radio, this is the first in a four-part series about what we owe our pets – and what we owe our neighbors.

For full credits and transcript, visit outsideinradio.org.

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After the Irish fought for and won their independence from the British in 1921, they had a problem. Centuries of exploitation had left the island one of the least forested nations in Europe, with less than 2% tree cover.

So, they started planting a non-native American tree: fast-growing Sitka spruce capable of rebuilding their timber resources in record time. And it worked. Today, about 12% of the island is forested. But in the rural areas where iconic rolling hills have been replaced by rows and rows of conifers, farmers are not happy.

Outside/In host Nate Hegyi takes us to County Leitrim, an area of Ireland hit hard by the Troubles and the Great Famine, to meet the townspeople who are fighting what they say is a new wave of colonialism: Sitka spruce plantations.

Produced by Nate Hegyi. For a transcript and full list of credits, go to outsideinradio.org.

Featuring: Justin Warnock, Brian Smyth, Donal Magner, Liam Byrne and Jodie Asselin

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To share your questions and feedback with Outside/In, call the show’s hotline and leave us a voicemail. The number is 1-844-GO-OTTER. No question is too serious or too silly.

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LINKS

Donal Magner wrote a book covering the history of Ireland’s forests and timber industry.

Sitka spruce plantations are controversial in other parts of Ireland as well, including Cork.

There are also efforts to rewild parts of Ireland with entirely native trees and to protect and restore carbon-sequestering bogs.

It can be really tough to figure out exactly what was growing in Ireland thousands of years ago – but these scientists used ancient pollen counts to figure it out.

Researchers at University College Dublin produced a detailed socio-economic impact report on sitka spruce plantations and County Leitrim in 2019.

Recently, our producer Justine Paradis noticed something. Humans really like to sing together in groups: birthday parties, sports games, church hymns, protest chants, singing along to Taylor Swift at the Eras concert… the list could get very long.

But… why? Did singing play a part in human evolution? Why does singing together make us feel so good?

Featuring Hannah Mayree, Ani Patel, Dor Shilton, and Arla Good.

For full credits and transcript, visit outsideinradio.org.

SUPPORT

To share your questions and feedback with Outside/In, call the show’s hotline and leave us a voicemail. The number is 1-844-GO-OTTER. No question is too serious or too silly.

Outside/In is made possible with listener support. Click here to become a sustaining member.

Subscribe to our (free) newsletter.

Follow Outside/In on Instagram or BlueSky, or join our private discussion group on Facebook

LINKS

Bobby McFerrin in 2009 at the World Science Festival, demonstrating the intuitive power of the pentatonic scale, and in 2010, improvising in a stadium in Germany with 60,000 singers.

A short documentary about Sing For Your Life! and OneVoice Circle Singers.

Check out Hannah Mayree’s music and work.

Dor Shilton and Ani Patel collaborated on a paper (currently preprint) examining four societies where collective music-making is rare.

Dor Shilton’s paper on the evolution of music as an “interactive technology” and open-access analysis of patterns in group singing.

This journal presented the hypothesis of music as a mechanism for social bonding as part of an ongoing conversation.

SingWell’s forthcoming research on group singing, aging, and Parkinson’s disease.

We’re used to seeing dogs and cats play with toys or get the zoomies… but do animals like rats and bumblebees play too? What is animal play for? How do scientists even decide what counts as play?

Today, we’re taking a serious look at goofy behavior. We’ll discover the five-part checklist that many scientists use to recognize play in nature, and find out why taking turns is so important for healthy brain development.

This episode is a collaboration between Outside/In and Tumble, the science podcast for kids.

Featuring Junyi Chu and Jackson Ham

Produced by Lindsay Patterson, Marshall Escamilla, and Taylor Quimby. For a transcript and full list of credits, go to outsideinradio.org.

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Outside/In is made possible with listener support. Click here to become a sustaining member of Outside/In.

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LINKS

Love this episode? Looking for family-friendly podcasts to listen to? There are over 150 episodes of Tumble to check out, including a few of our favorites:

Do Trees Fart?

The Swift Quake

Why Are Sloths Slow

Are Cats Evil?

The five-part play checklist mentioned in the episode was developed by play researcher Gordon M. Burghardt. His paper, “Play in fishes, frogs and reptiles,” answers some other really interesting questions about animal play.

In New Hampshire, the most beloved swath of public land is the White Mountain National Forest. People interact with it as they would a national park – hiking, swimming, camping, and more. But a national forest is NOT a national park.

The difference comes down to a fundamental concept: the “multiple-use” land mandate. In the WMNF, you’ll find parts of the forest preserved for wildlife conservation, recreation, climate resilience, and, most controversially, logging.

This episode looks at one patch of forest from three different perspectives: a conservationist who would like to see cutting halted in the WMNF, loggers who would like to see it ramped up, and the US Forest Service that has to somehow appease them both.

Featuring Zack Porter, Jeremy Turner, Charlie Niebling, Jasen Stock, Jim Innes, and Luke Sawyer.

SUPPORT

To share questions and feedback with Outside/In, call the show’s hotline and leave us a voicemail. The number is 1-844-GO-OTTER. No question is too serious or too silly.

Outside/In is made possible with listener support. Click here to become a sustaining member of Outside/In.

Follow Outside/In on Instagram or join our private discussion group on Facebook.

LINKS

Zack Porter references this study that shows the potential carbon storage in Eastern forests by 2100.

Conservation groups and logging advocates filed an amicus brief together against Standing Tree’s lawsuits.

In 2024, the Southern Environmental Law Center sued the Forest Service over its timber targets.

NHPR has been covering the legal fight in the White Mountain National Forest over the past year. You can read some of our previous coverage here and here.

CREDITS

Produced by Kate Dario. Full credits and transcript available on outsideinradio.org.