Could this nasal spray replace all your vaccines one day?

A cooler of eggs and a bold plan to save leopard sharks

Leopard sharks have nearly vanished from the waters in Raja Ampat, Indonesia. The country is one of the largest shark fishing nations in the world. Now, a first-of-its-kind conservation project is working to bring Indo-Pacific leopard sharks back from the brink of extinction. This international project hatches their eggs and raises shark pups to rewild them into the ocean where they once thrived. Will it be enough? For answers, we talk to freelance journalist Katerina Barton [https://www.katerinabarton.com/]. She takes us behind-the-scenes to a shark nursery and shares what this conservation project could mean for other shark species. Interested in more conservation news? Email us your question at shortwave@npr.org [shortwave@npr.org]. Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. It includes perks like bonus episodes, early access, archive access, curated playlists and sponsor-free listening. Learn more at plus.npr.org [http://plus.npr.org].  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]

Could this nasal spray replace all your vaccines one day?

There’s the flu vaccine. The covid shot. The RSV shot… What if all of these—and more—could be combined into one universal vaccine? That’s what immunologist Bali Pulendran [https://med.stanford.edu/pulendranlab.html] is working on in his lab. For this episode in our Tech Camp series, Regina G. Barber [https://www.npr.org/people/1082526815/regina-g-barber] talks to him about how far he’s gotten, how far he has to go and why our ancient immune system is the key to it all. Plus they discuss how the vaccine may not be a shot at all—but a needle-free nasal spray.  Sources:  Mucosal vaccination in mice provides protection from diverse respiratory threats [https://www.science.org/doi/10.1126/science.aea1260] Non-specific effects of BCG vaccine on viral infections [https://www.clinicalmicrobiologyandinfection.org/article/S1198-743X(19)30197-1/fulltext] Interested in more science of the future? Email us your question at shortwave@npr.org [shortwave@npr.org]. Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. It includes perks like bonus episodes, early access, archive access, curated playlists and sponsor-free listening. Learn more at plus.npr.org [http://plus.npr.org]. 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 problem with modern avocados — and the ancient solution

Did you know that when you pick up avocados at the supermarket, make avocado toast at home or order guacamole in your burrito, you’re probably consuming only one genetic type of avocado? Yep, it’s the Hass avocado. Since it originated in California [https://www.npr.org/2006/07/19/5563805/whats-in-a-name-the-avocado-story] in the 20th century, it’s been grafted onto trees worldwide. And today, it makes up more than 80 percent [https://www.sciencedirect.com/science/article/abs/pii/S026121941730220X?via%3Dihub] of commercial avocado production. Its bounty is a double-edged sword: It makes our avocados consistent; it also makes them susceptible to threats like new diseases and climate problems. In other words, we’re putting all of our eggs – er, avocados – in one basket. This episode, we get the inside scoop on new research that could help shore up the avocado’s chances at a long, more genetically diverse future. That way, avocados and their lovers alike can continue to thrive in the future. Read the research paper here [https://nph.onlinelibrary.wiley.com/doi/10.1002/ppp3.70236]. Interested in more plant anthropology science? Email us your question at shortwave@npr.org [shortwave@npr.org]. Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. It includes perks like bonus episodes, early access, archive access, curated playlists and sponsor-free listening. Learn more at plus.npr.org [http://plus.npr.org].  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]

Does the science of peptides live up to the hype?

Synthetic peptides are getting some serious hype, from fitness influencers on your FYP to people seeking new options for chronic conditions. And while the human body already makes peptides, like insulin and the hormone oxytocin, most of the viral synthetic peptides are not approved by the Food and Drug Administration. Scientists say that raises some big concerns about safety and efficacy. So ahead of this week’s FDA meeting to discuss seven commonly used peptides, we get into the science with health reporter Sarah Boden. Interested in more science behind health trends? Email us your question at shortwave@npr.org. Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. It includes perks like bonus episodes, early access, archive access, curated playlists and sponsor-free listening. Learn more at plus.npr.org [http://plus.npr.org/].  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]

Cyclosporiasis: the science, risks and red flags

What’s small, round and could give you explosive diarrhea? Cyclospora parasites. The diarrheal disease they cause is wreaking havoc on thousands this summer in what is the largest known flare up in the U.S. ever. What’s causing it and what can we do about it? NPR’s Joseph Kim [https://www.npr.org/people/g-s1-127759/joseph-kim] joins host Nate Rott [https://www.npr.org/people/348779465/nathan-rott] to talk about the outbreak – and how to protect yourself and your loved ones. Read more of Joseph’s reporting on cyclosporiasis here [https://www.npr.org/2026/07/12/nx-s1-5890935/cyclosporiasis-cyclospora-outbreak-diarrhea-states-us].  Interested in more science in the news? Email us your question at shortwave@npr.org [shortwave@npr.org]. Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. It includes perks like bonus episodes, early access, archive access, curated playlists and sponsor-free listening. Learn more at plus.npr.org [http://plus.npr.org]. 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]