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Lyt når som helst, hvor som helst 

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/shortwave

Short Wave

Teens aren’t getting enough sleep! And a two-decade study suggests it’s getting worse. Scientists found that the number of high schoolers getting insufficient sleep — less than seven hours a night — has increased from 69% to 77%. The throughline? There wasn’t one. Teens had bad sleep habits across most demographics, including race, gender and grade level. The findings were published this week in the journal JAMA.

Interested in more science behind recent headlines? Email us your question at shortwave@npr.org.

For more about earthquake science – and the Cascadia Fault in particular – check out our recent episode on the Pacific Northwest’s Big One.

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.

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Teen sleep is getting wrecked by more than just phones

In his role as secretary of Health and Human Services, Robert F. Kennedy Jr. is changing how the United States approaches vaccines. But those changes aren’t limited to the United States. NPR global health correspondent Gabrielle Emanuel joins Short Wave to talk about two examples of how the global public health landscape may be shifting. First, the United States’ ultimatum to an international vaccine group. Second, the uncertain fate of a vaccine trial. Some researchers are calling the trial a “unique” opportunity, and others are calling it “unethical.” 

Read more of global health correspondent Gabrielle Emanuel’s work here.

Interested in more global health? Email us your question at shortwave@npr.org.

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The global fallout of RFK Jr.'s vaccine policies

If you’ve been on the internet in the past few weeks, chances are you’ve seen him: a tiny gray-brown monkey dragging a big, stuffed orangutan around Japan’s Ichikawa Zoo. His name? Punch-kun, or Punch for short. His story? Early abandonment by his mother, careful treatment from local zookeepers and instant social media fame. But are all the (human) primates jumping to Punch’s defense justified? And what’s normal for Japanese macaque society, anyway? To find out, NPR’s Katia Riddle chats with psychology professor and animal expert Lauren Robinson.

Interested in more animal science? Email us your question at shortwave@npr.org.

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Will Punch the baby monkey be okay?

Lakes are freezing later, thawing earlier and experiencing dramatic temperature swings in between. And all that throws off the delicate balance of life below the surface. And that has a major impact on the roughly 1.7 million ice fishers in the U.S. who spend millions of dollars buying equipment and guide services each year. Producer Berly McCoy explains how scientists are tracking those ecological changes by getting out on the ice — to fish. 

Interested in more freshwater science? Email us your question at shortwave@npr.org.

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Spring ice is thawing earlier in lakes. What does that mean for life below the surface?

Over half a billion people live by lakes that freeze over in the winter. But as the climate warms, those lakes are losing whole days of ice cover. Winters are also getting weirder, with more intense temperature swings that lead to multiple freezes and thaws. Those fluctuations make the ice less safe, and more likely for people to fall through as they walk. So, today, producer Berly McCoy gets into how these changes are altering culture, community and safety on the ice – plus, how firefighters train for rescues. 

This is the first in a two-part series on how lake ice is changing. Check out Monday’s episode for part two!

Check out photos from Berly’s reporting trip to Madison, Wisconsin.

Interested in more winter 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.

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The dangers of warming winter lakes

Folks over 65 are putting in a lot of screen time. In 2019, the Pew Research Center found that people 60 years and older spend more than half their daily leisure time in front of screens, mostly watching TV or videos. Since the pandemic, that screen time has increased. Is addiction on the rise? And what’s the best use of screen time for any of us? We’re parsing out all the questions with Ipsit Vahia, the Chief of Geriatric Psychiatry at McLean Hospital. 

Interested in more stories about how technology is changing daily life? Email us your question at shortwave@npr.org.

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Screen time is up for grandma and grandpa

Helicopters. Cargo containers. Old washing machines. For years, fishermen dumped this waste into the Gulf of Mexico. But they weren’t just trying to get rid of junk; they were trying to create artificial reefs that would help attract fish. For this month’s Nature Quest, WWNO coastal reporter Eva Tesfaye takes a (metaphorical) dive into the gulf to find out if Alabama’s ocean junkyard is an economic – and environmental – solution.

Want to learn more about artificial reefs? Check out WWNO's podcast Sea Change for more reporting from Eva and her colleagues.

This episode is part of Nature Quest, our monthly segment that brings you a question from a Short Waver who is noticing a change in the world around them.
Send a voice memo to shortwave@npr.org telling us your name, location and a question about a change you're seeing in nature – it could be our next Nature Quest episode!

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.

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Could our trash become local fishes’ treasure?

Bring up aliens and a lot of people will scoff. But not everyone is laughing. Around the turn of the century, 3.8 million people banded together in a real-time search for aliens -- with screensavers. It was a big moment in a century-long concerted search for extraterrestrial intelligence. So far, alien life hasn't been found. But for scientists like astronomer Janes Davenport, that doesn't mean the hunt is worthless. It doesn't mean we should give up. No, according to James, the search is only getting more exciting as new technology opens up a whole new landscape of possibilities. So today, we're revisiting our episode on the evolving hunt for alien life. 

Want more space content? Let your opinion be heard by dropping us a line at shortwave@npr.org! 

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The serious hunt for alien life

Almost 15% of adults suffer from a persistent, often intolerable sound... that is literally just in their heads. Why does the brain do this to us? We help one of our listeners get some answers.

This is the second episode of a five-part series called The Sound Barrier from our friends at Vox's Unexplainable podcast.Guests: Stéphane Maison, director of the tinnitus clinic at Mass Eye and Ear and Dan Polley, tinnitus researcher at Mass Eye and Ear

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The noise that isn't there

From TikTok and Instagram influencers to celebrities like Hugh Jackman and Kourtney Kardashian, intermittent fasting has gotten a lot of hype. The diet restricts what time you eat rather than what or how much you eat. The idea is that short periods of fasting cause your body to burn through stored fat reserves. But is that conventional wisdom true? And can it really contribute to weight loss? Regina G. Barber and Rachel Carlson tackle those questions — plus why some researchers are rethinking how to protect people's mental health when talking to chatbots and how ultra-endurance running changes the human body.

Have a scientific question you want us to answer? Email us your question at shortwave@npr.org.

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The truth about intermittent fasting

A pivotal week in Corey Gray's life began with a powwow in Alberta and culminated with a piece of history: The first-ever detection of gravitational waves from the collision of two neutron stars. Corey was on the graveyard shift at LIGO, the Laser Interferometer Gravitational-Wave Observatory in Hanford, Washington, when the historic signal came. This episode, Corey talks about the discovery, the "Gravitational Wave Grass Dance Special" that preceded it and how he got his Blackfoot name. (encore)

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Picking Up Cosmic Vibrations

Lyt når som helst, hvor som helst

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