Why a chimp 'civil war' shows how societies collapse

Set up solar, or save a tree? It’s complicated

To solar or not to solar? That is the question for this latest episode of our monthly series Nature Quest. For listener Darcey Hughes, installing solar panels isn’t just about keeping her utilities free of fossil fuels – it’s also a way to become fully self-reliant and save some money each month. But there’s a catch: She might have to chop down a large, shading cedar tree. Today, we investigate: When is solar worth it? And is it worth the price of an old, majestic tree?  Do YOU have a question you have about your local environment? Send us a voice memo telling us your name, where you live, and your dilemma… we may make it the next Nature Quest  We’re reachable at shortwave@npr.org [shortwave@npr.org]. Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave [http://plus.npr.org/shortwave]. See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]

The mystery that led this family to get their stomachs removed

When Karyn Paringatai learned about a pattern among her family members, it changed the course of her life: A lot of people died young. As Karyn dug into her family history, she learned many Maori families, like her own, suffered from a rare form of stomach cancer called diffuse gastric cancer. Sarah Zhang [https://www.theatlantic.com/author/sarah-zhang/] recently wrote a story [https://www.theatlantic.com/health/2026/03/stomach-cancer-total-gastrectomy/686623/?gift=e8DbyF2sDmzhn965n7rLL7i5OyzgM0iPSAMNssaj6Ws&utm_source=copy-link&utm_medium=social&utm_campaign=share] on this kind of cancer as a staff writer at The Atlantic. Today, she gets into all the details with Short Wave host Emily Kwong: the mutation that causes it and the life-changing decision people with the mutation have to make – risk dying or get surgery to remove their entire stomach? Interested in more science? Email us your question at shortwave@npr.org [shortwave@npr.org]. Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave [http://plus.npr.org/shortwave]. Listen to Short Wave on Spotify [https://n.pr/3HOQKeK] and Apple Podcasts [https://n.pr/3WA9vqh]. See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]

Why a chimp 'civil war' shows how societies collapse

In the mid-1970s, primatologist Jane Goodall witnessed something that changed her opinion of chimpanzees forever: A four-year conflict amongst the chimpanzees she was studying in Tanzania. Chimpanzees that knew each other started killing each other. It was essentially the primate equivalent of a civil war. And now, it’s happening again: Fighting within the largest known community of chimpanzees. NPR science correspondent Nate Rott [https://www.npr.org/people/348779465/nathan-rott] helps us break down what’s going on and what it could tell us about how human communities can fall apart.  Read all of Nate’s story here [https://www.npr.org/2026/04/13/nx-s1-5781149/chimpanzee-civil-war-primate-conflict-anthropology].  Interested in more science? Email us your question at shortwave@npr.org [shortwave@npr.org]. Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave [http://plus.npr.org/shortwave]. See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]

Where did our moon come from?

Earth didn’t always have a moon. In the beginning of the solar system, when the planets were still forming, something happened that would change Earth’s night sky forever: The Moon was created! How did it happen? This episode, co-host Regina G. Barber searches for answers with planetary scientists. With co-host Emily Kwong, they discuss how the moon was likely made, how scientists know and what that might mean for where Earth’s water came from. Check out Regina's reporting on hydrothermal vents [https://www.npr.org/2024/11/04/1211597144/life-space-moon-alien-oceans-hydrothermal-vents]. Interested in more planetary science? Email us your question at shortwave@npr.org [shortwave@npr.org]. Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave [http://plus.npr.org/shortwave]. A previous version of this episode mischaracterized a scientific hypothesis. The episode incorrectly said the idea is that hydrothermal vents may have been the origin of water on Earth. In fact, the hypothesis is that life may have come from hydrothermal vents. See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]

Eating disorder recovery in a diet culture world

Eating disorders are complicated illnesses that skyrocketed among teenagers during the COVID-19 pandemic. Pediatrician Eva Trujillo [https://iaedpfoundation.com/2025-board-of-directors-announced/] says they "literally rewire the brain," decrease brain size, and make it harder to concentrate and to regulate emotions. Malnutrition can slow the metabolism, impact bone density and even lead to cardiac arrest. But Eva says, with the right treatment, people can also recover fully. She's the president of the International Association of Eating Disorder Professionals [https://iaedpfoundation.com/2025-board-of-directors-announced/] and co-founder of Comenzar de Nuevo [https://comenzardenuevo.org/tag/dra-eva-trujillo/], a leading treatment facility in Latin America. Today on the show, host Emily Kwong [https://www.npr.org/people/767284140/emily-kwong] talks about the physical and mental impacts of eating disorders with Dr. Trujillo and Moorea Friedman, a teen mental health advocate and host of the podcast Balancing Act [https://balancingact.life/]. Plus, how to recover in a world steeped in diet culture. (encore) Want us to cover more mental health topics? Tell us by emailing shortwave@npr.org! We'd love to know what you want to hear from us! Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave [http://plus.npr.org/shortwave]. See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]