Short Wave

Research into very, very old DNA has made huge leaps forward over the last two decades. That has allowed scientists like Beth Shapiro to push the frontier further and further. "For a long time, we thought, you know, maybe the limit is going to be around 100,000 years [old]. Or, maybe the limit is going to be around 300,000 years," says Shapiro, Professor of Ecology & Evolutionary Biology at UC San...

This March 14, Short Wave is celebrating pi ... and pie! We do that with the help of mathematician Eugenia Cheng , Scientist In Residence at the School of the Art Institute of Chicago and author of the book How to Bake Pi . We start with a recipe for clotted cream and end, deliciously, at how math is so much more expansive than grade school tests. Click through to our episode page for the recipes...

A new drug for Alzheimer's disease, called lecanemab, got a lot of attention earlier this year for getting fast-tracked approval based on a clinical trial that included nearly 1,800 people. It was the most diverse trial for an Alzheimer's treatment to date, but still not enough to definitively say if the drug is effective for Black people. "[In] the world's most diverse Alzheimer's trial, a giant...

Reading the science headlines this week, we have A LOT of questions. Why are more animals than just humans saddled — er, blessed — with vocal fry? Why should we care if 8 million year old plankton fossils are in different locations than plankton living today? And is humanity finally united on protecting the Earth's seas with the creation of the Biodiversity Beyond National Jurisdiction treaty? Luc...

Have you ever wondered how biologists choose what animal to use in their research? Since scientists can't do a lot of basic research on people, they study animals to shed light on everything from human health to ecosystems to genetics. And yet, just a handful of critters appear over and over again. Why the mouse? Or the fruit fly? Or the zebrafish? Cassandra Extavour , an evolutionary biologist at...

The whitebark pine is a hardy tree that grows in an area stretching from British Columbia, Canada south to parts of California and east to Montana. It's a keystone species in its subalpine and timberline ecosystems and plays an outsized role in its interactions with other species and the land — feeding and providing habitat for other animals, and providing shade to slow glacial melt to the valleys...

Indonesia is the world's largest exporter of coal for electricity. And it's also an emerging economy trying to address climate change. The country recently signed a highly publicized, $20 billion international deal to transition away from coal and toward renewable energy. The hope is the deal could be a model for other countries. But Indonesian energy experts and solar executives worry much of thi...

The Roman Colosseum is a giant, oval amphitheater built almost two thousand years ago. Despite its age and a 14th century earthquake that knocked down the south side of the colosseum, most of the 150-some foot building is still standing. Like many ancient Roman structures, parts of it were constructed using a specific type of concrete. Scientists and engineers have long suspected a key to these bu...

Chanda Prescod-Weinstein is a theoretical physicist at the University of New Hampshire . It's her job to ask deep questions about how we — and the rest of the universe — got to this moment. Her new book, The Disordered Cosmos: A Journey into Dark Matter, Spacetime, and Dreams Deferred , does exactly that. It's an examination of the science that underpins our universe and how the researchers seekin...

When Abra Lee became the landscape manager at Hartsfield-Jackson Atlanta International Airport, she sought some advice about how to best do the job. The answer: study the history of gardening. That led to her uncovering how Black involvement in horticulture in the U.S. bursts with incredible stories and profound expertise, intertwined with a tragic past. She's now teaching these stories and workin...

As a kid, Clarice Phelps dreamed of being an astronaut, or maybe an explorer like the characters on Star Trek. Her path to a career in science turned out to be a bit different than what she expected, including lengthy stints on a nuclear-powered aircraft carrier. But that path led her to being a part of something big: the discovery of a new element on the periodic table. Clarice talks to Short Wav...

Population geneticist Dr. Janina Jeff is the host and executive producer of In Those Genes , a hip-hop inspired podcast that uses genetics to uncover the those lost identifies of African descended Americans through the lens of Black culture. Short Wave co-host Emily Kwong speaks with Janina about what a person's genetic ancestry test does and does not reveal, and the complicated intersection of ge...

This week, the Environmental Protection Agency (EPA) will hold a public hearing about its remediation plan for cleaning up chemicals in and around East Palestine, Ohio. It follows the derailment of a Norfolk Southern train carrying hazardous chemicals like vinyl chloride and butyl acrylate near the town earlier this month. Residents were temporarily evacuated from the area two days later to allow...

In the Bekaa Valley region of Lebanon, there is a giant walk-in fridge housing tens of thousands of seeds. They belong to the International Center for Agricultural Research in the Dry Areas (ICARDA). Scientists from around the world use the seeds for research. ICARDA seeds have improved food security in several countries. They've transformed Ethiopian agriculture to use more drought-resistant crop...

In this Back To School episode we consider the "List of Life": the criteria that define what it is to be a living thing. Some are easy calls: A kitten is alive. A grain of salt is not. But what about the tricky cases, like a virus? Or, more importantly, what about futuristic android robots? As part of our Black History Month celebration, developmental biologist Crystal Rogers and scientist-in-resi...

Monday another earthquake struck southeastern Turkey, near the Syrian border. This time, the quake registered as a magnitude 6.3 — an order lower than the initial, devastating 7.8 magnitude earthquake and the magnitude 7.5 aftershock that struck the area two weeks ago on Feb. 6. A magnitude 6.3 is still considered strong , according to the United States Geological Survey (USGS). And as NPR previou...

The video game series that spawned the new hit HBO drama, The Last of Us, is the zombie genre with a twist. Instead of the standard viral pandemic or bacterial disease that's pushed humanity to the brink, but a fungus that has evolved to survive in human bodies in part due to climate change. Short Wave's Aaron Scott talks with fungal researcher Asyia Gusa about the science that inspired The Last o...

Many of us are off today for President's Day. In the meantime, we want to share this episode from our friends at NPR's Life Kit podcast. In it, they discuss the importance of birds as an "indicator species" – their health helps us understand the health of our environment. Plus, they collect expert tips on how we can help birds survive, and thrive. For more of Audrey's reporting, check out " North...

After reading the science headlines this week, we have A LOT of questions. Is chocolate really that good for your health? How do solar flares affect life on earth? And what's the big deal about scientists identifying the chemical motivation for tsetse fly sex? Luckily, it's the job of Short Wave co-hosts Emily Kwong and Aaron Scott and Scientist in Residence Regina G. Barber to decipher the scienc...

In Disney's new animated feature 'Strange World,' a band of multigenerational explorers journeys to the center of their fantastical homeland. Along the way, they fend off, make friends with, and unearth secrets about the curious creatures who call this place home. There's the filterlopes, six-legged deer-forms with fan-like antennae. Or scouts, squishy blue balls with 12 elastic limbs. But as fant...

A few years ago, a team of scientists set out on a field expedition in the rugged, dry Northern Territory of Australia. There, they found a plant that was both strange and familiar hiding in plain sight. After careful research during the pandemic, the newly described tomato recently made its debut in PhytoKeys , a peer-reviewed, open-access journal. Today, Short Wave Scientist in Residence Regina...

You may have heard of the "love hormone," or oxytocin. But you may not know that scientists have relied on cuddly rodents like the prairie vole to help us understand how this protein works in our brains. Voles are stocky, mouse-like little mammals that range over most of North America. One species in particular, the prairie vole, is known for its fidelity: Prairie voles pair-bond and mate for life...

During the COVID-19 pandemic, one measurement became more important than almost any other: blood oxygen saturation. It was the one concrete number that doctors could use to judge how severe a case of COVID-19 was and know whether to admit people into the hospital and provide them with supplemental oxygen. But pulse oximeters, the device most commonly used to measure blood oxygen levels, don't work...

Every year, lightning is estimated to cause up to 24,000 deaths globally. It starts forest fires, burns buildings and crops, and causes disruptive power outages. The best, most practical technology available to deflect lightning is the simple lightning rod, created by Benjamin Franklin more than 250 years ago. But lightning rods protect only a very limited area proportional to their height. So tod...

One of the most important tools the federal government has for cracking down on greenhouse gas emissions is a single number: the social cost of carbon. It represents all the damage from carbon emissions — everything from the cost of lost crops and flooded homes to the lost wages when people can't safely work outside and the cost of climate-related deaths. Currently, the cost is $51 per ton of carb...