Short Wave Podcast By NPR cover art

Short Wave

Short Wave

By: NPR
Listen for free

New discoveries, everyday mysteries, and the science behind the headlines — in just under 15 minutes. It's science for everyone, using a lot of creativity and a little humor. Join hosts Emily Kwong and Regina Barber for science on a different wavelength.

If you're hooked, try Short Wave Plus. Your subscription supports the show and unlocks a sponsor-free feed. Learn more at plus.npr.org/shortwaveCopyright 2019-2025 NPR - For Personal Use Only Astronomy Astronomy & Space Science Biological Sciences Politics & Government Science
Episodes
  • How did these flowers evolve to survive a megadrought?

    How did these flowers evolve to survive a megadrought?
    Mar 20 2026
    A multi-year megadrought in the Western U.S. has claimed untold populations of wild plants. Amid the conditions, some have survived. Scientists have produced a stunningly complete picture about how populations of one particular flower – the scarlet monkeyflower – made it through.

    In a new study published in the journal Science, a team of scientists spent decades studying and sampling select populations of scarlet monkeyflowers in California and Oregon. Through genetic sequencing, the team discovered that the populations that did best went through genetic changes in a short time period. This is known as rapid evolution.

    The team found that three of the populations that recovered the BEST adapted their stomata to open less, so they could conserve more water. Stomata act like a plant’s pores, managing gas exchange and water loss. This allowed the scarlet monkeyflowers to hunker down in the drought and survive.

    Interested in more stories about rapid evolution? Email us your question at 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.

    Listen to Short Wave on Spotify and Apple Podcasts.

    This episode was produced by Jeffrey Pierre, Rachel Carlson and Hannah Chinn. It was edited by Christopher Intagliata and Rebecca Ramirez. Aru Nair checked the facts. The audio engineers were Becky Brown and Robert Rodriguez.

    To manage podcast ad preferences, review the links below:

    See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences.

    Learn more about sponsor message choices: podcastchoices.com/adchoices

    NPR Privacy Policy
    Show more Show less
    8 mins
  • A dietitian and doctor review RFK Jr's new food pyramid

    A dietitian and doctor review RFK Jr's new food pyramid
    Mar 18 2026
    The new food pyramid was released earlier this year. It emphasizes protein, full-fat dairy and what Health and Human Services Secretary Robert F. Kennedy Jr. calls “healthy fats.” These guidelines influence the standards for school lunches, food labeling and programs like SNAP. Today on the show, Short Wave co-host Emily Kwong chats with registered dietitian nutritionist Shana Spence, and Dr. Sarah Kim, a diabetes specialist, about the new guidelines. Plus, NPR’s Reflect America fellow Kadin Mills unpacks how the new food pyramid could change school lunch trays.

    Check out more of Kadin’s coverage about the changes in dietary guidelines.

    Interested in more health science? Email us your question at 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.

    To manage podcast ad preferences, review the links below:

    See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences.

    Learn more about sponsor message choices: podcastchoices.com/adchoices

    NPR Privacy Policy
    Show more Show less
    13 mins
  • ‘Black rain’ in Iran and the environmental cost of war

    ‘Black rain’ in Iran and the environmental cost of war
    Mar 17 2026
    US-Israeli airstrikes on oil depots culminated in ‘black rain’ in Iran early last week – a phenomenon usually caused by large amounts of soot, carbon and other pollutants in the air. Usually, rain leaves the atmosphere cleaner than it was before. But in this case, the rain left Tehran’s residents with sore throats and burning eyes. Oily, sooty residue was all over the city. So, we talked to an environmental pollution expert to find out: What’s in this ‘black rain’, what are its potential short- and long-term environmental and health effects, and what could recovery look like?

    Interested in more science behind current events? Email us your question at 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.

    To manage podcast ad preferences, review the links below:

    See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences.

    Learn more about sponsor message choices: podcastchoices.com/adchoices

    NPR Privacy Policy
    Show more Show less
    13 mins

Featured Article: Go Beyond the Lab with the Best Science Podcasts for Curious Listeners


Our picks for the best science podcasts run the gamut from general scientific trivia to earth science, outer space, food, plants, the human body, and much more. They're all accessible—any listener can learn about scientific history, breaking science news, and visions for the future from these shows, which often feature interviews with a variety of interesting experts who provide valuable insight, perspective, context, and clarity.

Featured Article Go Beyond the Lab with the Best Science Podcasts for Curious Listeners
All stars
Most relevant
First time I am listening and definitely won’t be the last. This podcast is a gem not to be missed. Thanks for the creativity!

So Special

Something went wrong. Please try again in a few minutes.