Yi-Kai Tea, a biodiversity research fellow at the Australian Museum in Sydney, has amassed a social media following as @KaiTheFishGuy for his sassy writing and gorgeous photos of fish and other wildlife.

Kai recently returned from an expedition aboard an Australian research ship to explore the deep seas surrounding a new marine park in the Indian Ocean. Led by the Museums Victoria Research Institute, dozens of scientists aboard mapped the ocean floor and, using nets dropped to as deep as six kilometers, gathered thousands of specimens, ranging from the utterly adorable deep sea batfish to the terrifying highfin lizardfish to the unfortunately named bony-eared assfish.

Today on the show, Kai takes host Aaron Scott on a tour of the ocean floor and the fantastical creatures that call it home.

"They are masters of the realm," says Kai. "You can't live in 3,000 meters of water and not be a master at what you do. And the fact that these creatures are living down there, thriving and making the most out of these habitats, that's a remarkable feat."

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Vice President Harris is in California after a number of mass shootings in the state. The US Secret Service is out with a report documenting trends in attacks resulting in mass violence. And details on how one Nazi extremist group is recruiting new members in Florida.

This episode: White House correspondent Scott Detrow, politics reporter Deepa Shivaram, and domestic extremism correspondent Sergio Olmos.

This episode was produced by Elena Moore and Casey Morell. It was edited by Eric McDaniel. Our executive producer is Muthoni Muturi. Research and fact-checking by Devin Speak.

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As an emergency physician at Western Health, in Melbourne, Australia, Dr. Andy Tagg says he meets a lot of anxious parents whose children have swallowed Lego pieces. Much like Andy so many years ago, the vast majority of kids simply pass the object through their stool within a day or so. But Andy and five other pediatricians wondered, is there a way to give parents extra reassurance ... through science?

So the doctors devised an experiment. "Each of them swallowed a Lego head," says science journalist Sabrina Imbler, who wrote about the experiment for The Defector. "They wanted to basically see how long it took to swallow and excrete a plastic toy." On today's episode, Sabrina joins Scientist in Residence Regina G. Barber to chart the journey of six lego heads, and what came out on the other side.

Learn about Sabrina Imbler's recent book, How Far the Light Reaches, at their website.

Editor's note: This episode contains frequent and mildly graphic mentions of poop. It may cause giggles in children, and certain adults.

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The move, announced by President Biden in a speech from the Roosevelt Room of the White House, is the latest in a continued escalation of military equipment headed to the country from the U.S. and its allies. It comes as somewhat of a surprise: as recently as last week, top Pentagon officials were insisting that they would not send tanks.

This episode: White House correspondent Scott Detrow, White House correspondent Asma Khalid, and Pentagon correspondent Tom Bowman.

This episode was produced by Elena Moore and Casey Morell. It was edited by Eric McDaniel. Our executive producer is Muthoni Muturi. Research and fact-checking by Devin Speak.

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Film directors Daniel Kwan and Daniel Scheinert (collectively: Daniels) reimagined the multiverse movie in their breakout film Everything Everywhere All At Once. Tuesday, the film received 11 Oscar nominations for the 95th Academy Awards, including best picture and best director. This episode, the Daniels share how science played a starring role.

Curious about the science behind other pop culture? Email us at [email protected]. We might give it 15 minutes of Short Wave fame in an upcoming episode.

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Democrats head into the 2024 elections needing to defend far more seats in the Senate than their Republican counterparts. With potentially vulnerable incumbents in Montana & West Virginia — and a potential three-way race in Arizona — the GOP seeks to capitalize.

This episode: White House correspondent Scott Detrow, congressional correspondent Deirdre Walsh, and political correspondent Susan Davis.

This episode was produced by Elena Moore and Casey Morell. It was edited by Casey Morell. Our executive producer is Muthoni Muturi. Research and fact-checking by Devin Speak.

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Most people are focused on the present: today, tomorrow, maybe next year. Fixing your flat tire is more pressing than figuring out if you should buy an electric car. Living by the beach is a lot more fun than figuring out when your house might be flooded by rising sea levels.

That basic human relationship with time makes climate change a tricky problem.

Host Emily Kwong talks to climate correspondent Rebecca Hersher about how our obsession with the present can be harnessed to tackle our biggest climate problems.

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The White House said FBI agents searched President Biden's Delaware home on Friday, finding more items with classified markings. The search took place voluntarily, and without a search warrant.

Vice President Kamala Harris traveled to Florida on Sunday to mark the 50th anniversary of the Roe v. Wade decision. Her speech came alongside new announcements in White House policy concerning reproductive rights.

This episode: White House correspondent Scott Detrow, politics reporter Deepa Shivaram, and national political correspondent Mara Liasson.

This episode was produced by Elena Moore and Casey Morell. It was edited by Casey Morell. Our executive producer is Muthoni Muturi. Research and fact-checking by Devin Speak.

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This mystery begins in 1952, in the Nevada desert, when a self-taught geologist came across the skeleton of a massive creature that looked like a cross between a whale and a crocodile. It turned out to be just the beginning.

Ichthyosaurs were bus-sized marine reptiles that lived during the age of dinosaurs, when this area of Nevada was underwater. Yet paleontologists found few other animals here, which raised the questions: Why were there so many adult ichthyosaurs, and almost nothing else? What could have killed them all?

Paleontologist Neil Kelley says that recently, there has been a major break in the case—some new evidence, and a hypothesis that finally seems to fit. Neil talked with Short Wave co-host Aaron Scott about his theory of the case, and why it matters to our understanding of the past.

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Documents were at the heart of Washington news this week. A Supreme Court investigation into who leaked a draft opinion of the decision overturning Roe v. Wade failed to identify who was responsible; the White House's communications strategy in handling the president's classified document dilemma has left much to be desired; and, a State Department decision to change fonts has our cast thinking.

This episode: White House correspondent Tamara Keith, legal affairs correspondent Nina Totenberg, political correspondent Susan Davis, and senior political editor and correspondent Ron Elving.

This episode was produced by Elena Moore and Casey Morell. It was edited by Casey Morell. Our executive producer is Muthoni Muturi. Research and fact-checking by Devin Speak.

Unlock access to this and other bonus content by supporting The NPR Politics Podcast+. Sign up via Apple Podcasts or at plus.npr.org.

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