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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.

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Short Wave

There are more human cells in your body than there are stars in the Milky Way galaxy! Cells are the fundamental building blocks of life but that doesn’t mean they are simple – biology still doesn’t have a full picture of how exactly a living cell works. Host Regina G. Barber talks with bioengineers Kate Adamala and Drew Endy about why scientists are trying to build a cell from scratch, piece by piece. They dive into what it would look like to be inside of a cell, why scientists are bothering with making a cell from scratch and how engineers are leading the field.

Want more bioengineering stories? Email us at shortwave@npr.org.

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Synthetic Cells: The Next Bioengineering Frontier

Weather in the tropics is decidedly different than it is in the middle latitudes. It turns out, so are the weather systems – the factors that create things like the daily temperature and humidity! Historically, most weather forecasting models have been based on data from high-income countries in the northern hemisphere. But different factors drive weather and climate near the equator – meaning that these weather forecast models are much less accurate at predicting weather in the tropics. This has implications for storm readiness, flooding preparedness and more. 

Atmospheric scientist Ángel F. Adames-Corraliza is aiming to change that. His research focuses on how water vapor – humidity – plays a key role in tropical weather systems. It’s earned him a spot as one of this year’s Macarthur Fellows. 

Interested in more science about how weather happens? Email us your question at shortwave@npr.org.
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Why The Tropics Have A Weather Forecasting Problem

Some scientific discoveries take place in a lab. Others are made deep in the rainforest, along the ocean floor or on the dark side of the moon. And still others are made squelching through mud and ice on the northernmost island on Earth… at least, if you’re NPR climate correspondent Alejandra Borunda. Two summers ago, Alejandra followed an expedition of scientists to Greenland’s Inuit Qeqertaat, or Kaffeeklubben (“Coffee Club”) Island. The researchers with her were aiming to find what plants grew at the farthest north point of the island. Along the way, she had an adventure … and witnessed the good, the bad and the muddy realities of scientific expeditions.

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

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Doing Science at the Edge of the Earth

Usually, when two different species mate, it’s a disaster. At least, that’s what scientists had generally thought about hybrids, the offspring of these unions. But some researchers are starting to change their view as they learn of more beneficial hybrid events. The Atlantic science journalist Katie Wu details two of these hybridization examples: one in desert frogs and one in two ancient plants that <> led to the modern potato.

Interested in more biology episodes? Email us your question at shortwave@npr.org.

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Solved: The Potato Origin Mystery

Creepy crawly season is upon us, Short Wavers! We're welcoming fall with a contemplation of fear and anxiety. In human history, fear kept us safe. It helped us flee from predators. Anxiety made us wary of potential dangers — like venturing into a known lion-infested area. But what happens when these feelings get out of hand in humans today? And why do some of us crave that feeling from scary movies or haunted houses?

For answers, we talk to Arash Javanbakht, a psychiatrist from Wayne State University. He likes studying fear so much he wrote a whole book called Afraid. In this episode, Javanbakht gets into the differences between fear and anxiety, many of the reasons people feel afraid and why things like scary movies could even be therapeutic. (encore)

Want to know more about the science behind what keeps you up at night? Email us at shortwave@npr.org — we might cover it on a future episode!

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The Science Of Fear And Horror Movies

In the North Sea — between the United Kingdom, Norway and Denmark — thousands of flies swarmed an oil rig. Engineer Craig Hannah noticed they’d stay still on the rig for hours, suddenly taking off all at once. He was seeing hoverflies. Often confused with bees, they’re unsung pollinators. And they migrate, often hundreds of miles – including, it seems, to the middle of the ocean. 

Today on the show: The mystery of why these insects are landing in the open ocean. Plus, a surprising finding in the Amazon rainforest and the sounds of life in a coral reef. 

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

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What Are Flies Doing In The Middle Of The Ocean?

Worldwide, populations of scavenging animals that feed on rotting carcasses are declining. Scientists are finding that this can seriously hurt human health. NPR science reporter Jonathan Lambert has been looking into how human health is intertwined with scavenging animals and why these animals’ decline could lead to more human disease. Today, he brings all he learned, including how conservation could help, to your earholes.

Check out more of Jon’s reporting on scavengers and human health.

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

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Why Animal Scavengers Protect Your Health

How high will the ocean rise under climate change? By 2050, scientists have a pretty good idea. But why does it matter where you live? And what can humans do to slow it down? 
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. Our question comes from Peter Lansdale in Santa Cruz, Calif. 

To see what future sea levels will look like where you live, check out NOAA’s Sea Level Rise Viewer here.

Noticed any changes in *your* local environment that you want us to investigate? Send a voice memo to shortwave@npr.org telling us your name, your location, and the change you’ve noticed – it could be our next Nature Quest episode!

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Nature Quest: How High Will Sea Levels Rise?

You’ve probably heard of PTSD, post-traumatic stress disorder. But what about its counterpart, post-traumatic growth?
The term was coined in the 90s to describe the positive psychological growth that researchers documented in people who had been through traumatic or highly stressful life events. Psychologists and sociologists conducting long-range studies on survivors of Hurricane Katrina – which hit 20 years ago and remains one of the most devastating natural disasters to hit the US – are continuing to learn more about it. 

So how do you measure post-traumatic growth? Can it co-exist with PTSD? NPR mental health correspondent Rhitu Chatterjee explains what scientists have found so far … and how it could help shape disaster relief efforts in the future.

Interested in more psychology and social science stories? Email us your question at shortwave@npr.org.

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Why Do Some Hurricane Survivors Thrive After Disaster?

Since the age of nine or ten, Katie Burns has had debilitating pain from endometriosis, a condition where tissue resembling the uterine lining grows outside the uterus. For years, Katie was in the dark about what was causing her pain. Even after a diagnosis at age 20 it was hard to find relief, or even answers about her condition. Her search for better care is part of what led her to a career studying the disease, which affects tens of millions of people worldwide. And in 2012, she discovered something new about its origins. Today, we talk to Katie and science reporter Meredith Wadman about that discovery, which points to a surprising culprit of endometriosis — the immune system.

Read Meredith’s full piece in Science Magazine HERE. 

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

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A Surprising Cause Of Endometriosis Could Lead To Cure

The Vertebrate Genomes Project: It's an ambitious effort by an international group of scientists to create a "Genome Ark" by sequencing the genomes of about 70,000 animal species. The hope is that through all of this gene sequencing, scientists will be able to answer some basic but important questions like: What makes a bird, well, a bird? What makes a mammal a mammal? Plus, with so many species on the verge of extinction, can scientists record their genetic information before they go extinct – or better yet, maybe help save the population from going extinct? Guest host Jon Hamilton, one of our favorite science correspondents, talks to Erich Jarvis, the chair of this project, to learn what this ark of animal genomes could mean for our future – and why a platypus qualified for early boarding. 

Want to hear more animal stories? Let us know at shortwave@npr.org — we read every email.

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The Ambitious Quest To Genetically Map All Known Vertebrates

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