Why you can't stop scrolling: the science of 'dark flow'

Why are scientists planting tiny forests in big cities?

Healthy forests help combat climate change, provide humans with drinking water and even improve mental and physical health. But it’s hard to imagine an entire forest in the middle of a big city. That’s where micro-forests come into play — public forests on a smaller scale, filled with native plants. They exist around the world, and producer Rachel Carlson went to visit the largest micro-forest in California in this encore episode. She joins host Emily Kwong to chat about what she saw.  Interested in more of the science behind urban nature? 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]

Why you can't stop scrolling: the science of 'dark flow'

You pick up your phone to do one quick task, and suddenly 20 minutes have flown by without you even noticing. How do apps do that to you? Science journalist Michaeleen Doucleff [https://michaeleendoucleff.com/] felt like her phone had superglue on it, holding her on it for hours each day while draining her of time and energy. Turns out, that feeling isn’t accidental. In her new book, Dopamine Kids [https://michaeleendoucleff.com/dopamine-kids/], Michaeleen describes four features that tech companies add to apps to keep us scrolling for as long as possible. She’s sharing this superglue recipe with Short Wave host Emily Kwong … and explaining how these features can pull people into what scientists call a ‘dark flow’ state. Interested in more tech and social media 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]. This episode was produced by Hannah Chinn. It was edited by Rebecca Ramirez. Tyler Jones checked the facts. The audio engineer was Jimmy Keeley. 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]

This distant planet has wild weather and gemstone clouds

For many astronomers and astrophysicists there are two distinct, important periods: before the James Webb Space Telescope – and after. It has powered many scientific discoveries since it came online, including two at the heart of this episode: insights into one of Neptune’s moons and a “hot Jupiter” exoplanet orbiting another star. This exoplanet has a strange weather system with high winds and cloud coverage only on one side of the planet. Fill in some of the scientific gaps about our solar system and the universe beyond with us. Interested in more space 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]

Should we reengineer the world's deadliest animal?

The most ferocious predator for us humans is actually quite small: the mosquito. They are hungry for blood, spreading diseases like malaria, yellow fever and dengue – and picking up new ones all the time. But what if we could wipe out the mosquito? Gene-editing technology could do it, potentially saving millions of lives. But it comes with serious potential for risk. Which begs the question: Should we get to decide when humanity rewrites nature? Here to discuss that is Ben Bradford [https://www.linkedin.com/in/jbenbradford/], the host of a new podcast distributed by the NPR Network: Are We Doomed? [https://www.npr.org/2026/04/21/g-s1-118208/a-new-npr-network-podcast-asks-the-big-question-are-we-doomed] 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]

Is it getting windier?

Is it getting windier? Long-time listener Barry Zalph thinks it is, at least in Louisville. And he’s not the only one. Redditors [https://www.reddit.com/r/Louisville/comments/1ssool0/windier/] and local reporters [https://www.whas11.com/article/news/local/louisville-wind-severe-weather-damage-year-windy-windier-national-weather-service-nws/417-c37a5664-2de9-4d8c-8c96-f8bb43108c71] have noticed a recent uptick in the region’s windstorms, too. But does that point to any larger trends in windiness? And if so, what could be causing it? We talked to meteorologist and extreme weather specialist Scott Gunter [https://profiles.louisville.edu/william.gunter] to find out. Plus, we dig into whether Tornado Alley is shifting into Kentucky as the climate warms.  This episode is part of Nature Quest, our monthly listener-driven segment about climate and the environment. Have a question for us? Send a voice memo to shortwave@npr.org [shortwave@npr.org] with your name, location and what you’re noticing in the environment around you… it could be our next Nature Quest! Interested in more weather and wind 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]