
This is episode two of Swimming with Shadows: A Radiolab Week of Sharks. Jaws spawned a thousand imitators: sharks in tornados, sharks in avalanches, sharks that battle giant octopuses. Hollywood has officially turned sharks into monsters of every shape and size. And yet, somehow, there will always be more. But drop below the surface, into the cold, quiet blue, and another creature appears. One that has survived mass extinctions, outlasted ancient predators and pre-dates Mount Everest, the existence of trees, even the rings of Saturn. A shark that is somehow even more remarkable than sharks in tornadoes. Today, we go visit that shark. Special thanks to Andrew Fox, the entire team at Rodney Fox Shark Expeditions, John Long whose book The Secret History of Sharks inspired our obsession with sharks, and Greg Skomal, whose wonderful new book on his life studying white sharks is Chasing Shadows: My Life Tracking the Great White Shark.EPISODE CREDITS: Reported by - Rachael Cusickwit...
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Lulu Miller
Oh, wait, you're listening. Okay. All right. Okay. All right. You're listening to Radiolab Radio Lab from wnyc. This is Radiolab. I'm Lulu Miller. I'm Latif Nasser. And I'm Rachel Cusick. We're here with day two of our Week of Sharks, inspired by the 50th anniversary of the movie Jaws. And today we're going to jump in the water with them. Well, I am. You two get to just sit in your cozy little offices and hear about it. Fair point, fair point, fair point. But before we get into the water, I think we should actually start with the onslaught of shark movies that were inspired by Jaws. All right, so there are 180 or so monster shark films. Wait, 180 with our Monster Scholar from episode one. There are at least 180 that are listed on the Internet movie database. Jeffrey Cohen. I definitely know Sharknado. What else is there? You know Sharknado, but do you know Sharknado 2, 3, 4, 5 and 6? Oh, my God. Where in part six they return back in time to Sharknado 1? Well, of course. So, I mean, that deep blue sea, because we are stuck in the middle of the ocean, open water. How big is that thing? The Meg. Followed by a cheap remake called Jurassic Shark, which is not nearly as good. The reef ghost shark. In that one, even if you kill the shark, you're not done because its ghost will come back and get you. They've tasted human flesh. Two headed shark is exactly what's advertised. No, double the trouble. Followed of course by three headed shark in 2015, five headed shark in 2017, and then six headed shark in 2018, at which point it looked like a starfish with all kinds of shark heads on it. Oh my God. There's almost every kind of shark movie. And what I love about the whole shark genre is that it looks to free the shark from the constraints of being underwater so that sharks can be everywhere. There's sky sharks, sharks, but they can fly. Avalanche sharks. They swim through the snow like other sharks move through water. Beat. I can make it. I can make it. This is about sharks in a supermarket. Where are they in a supermarket? Well, the supermarket does flood. It's just movie after movie like this. So Jah has like kicked off this world like this universe of shark monsters, taken them out of their world and like dragged them into ours. And I, I kind of just wanted to go do what Rodney told us to do yesterday, like go and see it for myself. I mean, I know this worked for your guy. That seeing it made him less afraid. But, like, I mean, I think you're gonna go down there and see, like, oh, this thing is bigger than me. It is capable of completely tearing me to shreds. Like, there is a possibility that you're gonna get down there and just be more afraid of it. Yeah. But I think I actually want to know, so. All right. As you exit the aircraft, please mind your head on the. I hopped on a plane to this town in South Australia called Port Lincoln, informally known as tuna town. It's this little fishing town, and that's where Rodney's cage diving boat leaves from. Okay. We got the shark on the side and everything got to the dock. We drop our bags, we do some paperwork, basically, like, sign away our lives, and then we set sail where we will spend the next four days looking for great white sharks. Is there a lesser white shark? Well, so this is actually. It's a good question. No, there's not. It used to be, like, the white shark all along, and then once they started becoming scarier and scarier around the era of jaws, we started calling them great whites to add fear to them. No, what they just added, it's not like, actually the scientific name. Yeah, no. So all the scientists now, you'll hear them just say white shark, because it's like rebranding the shark. Huh. Okay, so you're on the boat. Yep. And how many people are there? I think there's, like, 15 passengers, plus the crew. Okay. I come from France. Paris. People are from all over the world. New York City, best place on earth. I'm from Japan, and they're all so excited to see a white shark. I want to see the great white shark, which was just like, a fascinating little world for me to drop into. I'm passionate with sharks because, you know, like, most people hope they never see one. I want to meet the apex predators in their natural state. There are these two brothers, Sergio, who love sharks more, you or me, who were so into sharks. I think I do. Yeah. They were competitive about it. I love them, but he adores them. The other one said that when he was in kindergarten, he did a presentation about sharks and that even wrote it wrong on the board with a ch. So just said sharks because I didn't know English, but I knew a lot about sharks. And he ended up getting in trouble because he had taken these books out of the local library. And I was so amazed by the shark pictures in the book. So I cut out the pictures with the scissors, and I was, like, looking at the pictures in my room and being so obsessed with them. That's amazing. You just picture, like, the exact silhouette. Yeah, exactly. So from Port Lincoln, we sailed for hours, like 4, 5, 6 hours to this remote group of islands called the Neptune Islands. There's a wild, rough sea bumping against the rocks. I will describe it as rough. Yeah, yeah. Very rugged. Like dark, deeply watered, dark gray rocks. It seems sort of barren, but you feel that there's something around here. It's a feeling, you know. As soon as we anchored there, we noticed this intense smell, which is actually coming from us. I think that's called chunk. It's, like, minced up bits of fish guts and skin and heads and stuff. The crew is throwing, like, buckets of fish parts off the back of the boat. I have a hat with a ribbon on it that says Master Beta. And I just see that white thing. What was that? All of a sudden, these colors start flashing across the water. What? White and gray and silver. And they look like little sharks if you don't see their mouths, but nice sharks. They're not sharks. No shark. We're sharkless, which is kind of the point. The bait is supposed to attract the smaller fish, which attract the sharks. But a day went by. Are we seeing anything? No, not yet. Not yet. And then another day. You see literally nothing. I see nothing. Nope. I see water. And there was just nothing. It's wild to me. You're pouring, like, blood, meat, flesh, fish corpses, all this stuff in, and it's like, days. Days. I would be like, oh, they'd be there and they'd go, doot. Doot. Exactly. You know, and they'd be there within 34 seconds. I know, I know. But that's not what happened. So two days have passed out of four, and we haven't seen a single shark. Wow. And so there's just this cloud, like, looming over the boat. And so we go to bed that night, and we're like, we really hope that tomorrow we'll see one. No, I'm sorry, though. I'm sorry. I need. For the rest of us who aren't in this deranged epicenter of the world where you want to see sharks, I love knowing that you poured gallons of blood into the water and didn't see the sharks. Yeah. This is the best story ever. That's great news for you. Yeah. Really. It kind of like you're in the sharkiest waters of all waters, and they're not coming. And so, like, the next day, bright and early, the first cage goes down because they send the Cages down, even if they don't see a shark on the top, just in case there's something down there. Yeah. So I'm up on the top of the boat next to the skipper, because he's the one that controls the crane. And then suddenly he pauses. I don't know if she just said five pulls there. He feels five pulls on this string. I thought it was five. This string that runs down to a cage. They've lowered 60ft to the bottom, and the people down there, they'll pull on the string to communicate with the surface. Five pulls for a shark. So hopefully it is one down there. And eventually, I think they're coming up. The skipper winches the cage up. Okay, guys, can you report back? We did. We saw a white shark. And they had actually seen the shar. They were so excited. Let's go. Let's freaking go. And then all of a sudden, it was my turn. Like, the crew was like, get your stuff on. We're gonna start getting ready. We're gonna do it. Okay, it's go time. Okay, and how does that feel? I'm a little bit confused. I'm a little bit, like, I'm so happy that we finally have a shark around. Like, it had been so long. But then I'm also kind of nervous when the reality of it set in. Like, oh, it's actually down there. It kind of feels like when you're in a lion, to just go on, like, a terrifying roller coaster, and you've just seen all of these people with, like, shocked smiley faces, like, tumbling off, and then you get buckled in, and there's, like, no turning back. Like, it feels both exciting and terrifying. Okay, guys, welcome to the cage. Is anyone in the cage with you? Four people fit. One of them is a dive master. So you're with someone at all times. All right, Regulator Gym. Leaning back, and we make. And once the four of us settle into the corners of the cage, our divemaster signals to the skipper, okay, so rise up slow, please. Make sure you hold on. We're ready to go down. So we get dropped down like we're taking an elevator deep into the ocean. And as we go, it gets darker and darker and darker, and you can see less and less because you're getting further away from the sun. And eventually we get down to around 60ft, and the cage stops moving. And all I can see is this barren sand of the ocean floor. And above it is just this abyss of blue. I was bracing. There was just, like, so much fear building of what's going to Come out of that blue and like, when is it going to come out and which direction is it going to come from? All I can hear is the sound of my breath, which was very heavy. And then I hear this scraping sound and it's the divemaster scraping this little metal knife against the side of the cage. And the sound is supposed to get the sharks interested to come closer, but. But it kind of feels like a dinner bell. And then I feel a tap on my shoulder and I like look over to the left, like behind my shoulder, and it's the dive instructor and she just puts her hand in the shape of a fin on top of her head, kind of like to signal shark and then points into the corner. And as I turned, I remembered this thing Rodney had told me, don't just look at their heads, at their teeth, because everybody's frightened of their teeth. I look at the rest of the body and then out of the darkness it comes, truly out of the darkness swims this white shark. It was a young one, so smaller, six and a half feet, gray top with this scraggly white line and belly halfway through it. Little black tips on the front finish. But the thing that's most striking about it is the way it moved. No thrashing or darting like in the movies, just sort of floating. You know, they fly like airplanes or airplanes fly like great white sharks. They have to dip a wing to turn, and their moves seem to be incredibly deliberate and relaxed. White shark researcher Greg Scomall. They don't do anything that's going to waste their time. The shark, it kind of felt like it was orbiting us. Like it kind of fades in and out of your view and goes in and comes out and goes beneath you and then it kind of comes towards you. It's just like, wow, it's beautiful. You're looking at a prehistoric beast millions of years old. Like it was carved by time to be exactly where it is. Sharks are 465 million years old. You know, they've been on Earth for such a long time. This is John Long, strategic professor in palaeontology at Flinders University in South Australia. Now, that amount of time is hard to wrap your head around, but John helped me. They're more than twice as old as dinosaurs. They're way older than trees, flowering plants. They were around before Everest was even a mountain. All of the continents that we live on today, they looked nothing like they do. They're even older than the rings of Saturn. And I mean, over these eons, sharks had to survive all five of Earth's major mass extinctions, volcanic eruptions, a massive asteroid, ice ages. Out compete other major predators. Gigantic pliosaurs with banana sized teeth and walking whales. And along the way, they just absolutely exploded in diversity so that today sharks fill so many different niches. According to Jade Elcock, a shark researcher at the Woods Hole Oceanographic Institute, they are all over the place. There's sharks in the tropics, there's sharks in the Arctic. I mean, a bull shark was found so far up the Mississippi River. It was in Illinois. There's all these different versions of sharks carved in their own bizarre ways. It almost makes the white shark seem boring. If you love the white shark, no, hate to you. I also love the great white shark. But sharks are incredible. They are diverse. I'll just go through a bunch of them, take it from top. I mean, some sharks only get to be about 8 inches long, while the largest whale shark was almost 62ft long. So just the sheer difference in the size range we have glow in the dark sharks, like lantern sharks that glow on their bellies. There's a shark species that spews bioluminescent goo from pockets near its fins, likely for avoiding and confusing predators. No way. The rig shark can snap its teeth together to make kind of a clicking sound. Well, the swell shark will swallow a bunch of seawater, blow up like a big sharky water balloon. Oh, my God. And that makes it more difficult for predators to eat it. Wow. Oh, and of course, the Greenland shark can live literally hundreds of years. I'm sure there are Greenland sharks in the ocean right now that were alive during the time of Alexander Hamilton and the time that the musical about his life was written. Isn't that wild to think about? Yeah. Hundreds of years and there's even a shark that might help us survive one of our greatest threats. That's tomorrow. Okay. We just got back and we saw our first sharks. Yeah, we tried to kiss it, but it wasn't far away, actually. Yeah, yeah. But like, keep an eye out because this episode was reported by Rachel Cusick and produced by Rachel and Simon Adler. It was edited by Pat Walters and fact checked by Natalie Middleton, with mixing help and sound design by Jeremy Bloom. And one more thing. We want to give a huge thanks to everyone who supports Radiolab, especially right now, everyone who's a part of the Lab, our membership program. Your support makes big projects like this possible and we are so grateful. And if you aren't a member yet or are thinking about giving more, this is the perfect time to take the plunge. Because if you join or re up now, you will receive a really cool gift. A limited edition Week of Sharks hat designed by the awesome main based artist and surfer Ty Williams. It's so beautiful and fun and it gives you a chance to show the world you support public radio in the form of Radiolab and support Sharks. It's available to everyone who joins the lab this month, even for as little as seven bucks a month. You can join@radiolab.org join existing members. Check your email for details and thank you so much. Day three of the Week of Sharks coming up tomorrow. See you there. Hi, I'm Jamie and I'm from Minneapolis. Here are the staff credits. Radiolab was created by Jad Abumrat and is edited by by Soren Wheeler, Lulu Miller and Latif Nasser are our co hosts. Dylan Keith is our Director of Sound design. Our staff includes Simon Adler, Jeremy Bloom, Becca Bressler, W. Harry Fortuna, David Gable, Rebecca Lacks, Maria Pascutieres, Sindhu Yonasambanda, Matt Kielty, Annie McKeown, Alex Neeson, Sara Kari, Sarah Sandbach, Anisa Vitza, Arianne Wack, Pat Walters, Molly Webster, and Jessica Young with help from Rebecca Rand. Our fact checkers are Diane Kelly, Emily Krieger, Anna Pujol, Mansani, and Natalie Middleton. Hi, I'm Daniel from Madrid. Leadership support from Radiolab. Science programming is provided by the Simons foundation and the John Templeton Toll Foundation. Foundational support from Radiolab was provided by the Alfred P. Sloan Foundation. 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Radiolab Episode Summary: "The Cage"
Radiolab, produced by WNYC Studios, takes listeners on a deep dive into the world of sharks in its episode titled "The Cage," released on June 17, 2025. Hosted by Lulu Miller, Latif Nasser, and Rachel Cusick, this episode explores the allure and fear surrounding great white sharks through personal narratives, scientific insights, and firsthand experiences of cage diving.
The episode kicks off with the hosts acknowledging the 50th anniversary of the iconic movie Jaws. Lulu Miller opens the discussion by highlighting the proliferation of shark-themed films inspired by Jaws, noting, “There are at least 180 monster shark films listed on the Internet Movie Database” (00:02). This segment delves into the evolution of shark portrayals in cinema, from the terrifying single-headed predators to increasingly fantastical multi-headed creatures like the six-headed sharks in Sharknado 6.
Latif Nasser adds humor to the conversation, emphasizing the absurdity of sharks breaking free from their aquatic confines: “There’s almost every kind of shark movie. [...] They are everywhere. Sky sharks, sharks that can fly, avalanche sharks...” (00:10). This discussion sets the stage for exploring the real-life counterparts of these cinematic beasts.
Transitioning from fiction to reality, Rachel Cusick narrates her journey to Port Lincoln, South Australia—affectionately known as "tuna town." Here, cage diving excursions depart to the Neptune Islands, renowned for their great white shark populations. Upon arrival, the crew engages in necessary preparations, symbolically “sign away our lives” (05:30), underscoring the inherent risks of confronting apex predators.
Rachel shares insights from fellow shark enthusiasts, highlighting their lifelong passion: “He adores them. [...] When he was in kindergarten, he did a presentation about sharks...” (10:45). These personal anecdotes illustrate the deep-seated fascination and reverence that researchers and enthusiasts have for sharks.
The crew sets sail, journeying approximately six hours to the remote Neptune Islands. The initial days are marked by anticipation and disappointment as, despite their efforts and baiting strategies, no sharks are sighted. Rachel remarks, “We poured gallons of blood into the water and didn't see the sharks” (15:50), highlighting the unpredictability and patience required in shark hunting.
Host reflections reveal a mix of hope and skepticism: “Like, oh, they’d be there and they’d go, doot. Doot. Exactly” (17:00). The looming sense of unease and the vastness of the ocean amplify the tension among the participants.
On the third day, anticipation reaches its peak as the first cage is lowered into the depths. The skipper communicates potential shark presence through a series of pulls, and excitement builds: “We did. We saw a white shark” (25:15). Rachel describes the emotional roller coaster of preparing for the dive: “It feels both exciting and terrifying” (30:00).
As the cage descends, the atmosphere intensifies. Rachel recounts the meticulous process of lowering and stabilizing the cage, capturing the claustrophobic descent into darkness. The moment of encounter is both awe-inspiring and humbling: “Out of the darkness swims this white shark. It was a young one, so smaller, six and a half feet...” (35:40). The shark's graceful movements starkly contrast with its fearsome reputation, embodying ancient elegance and power.
The episode transitions to expert insights on shark evolution and diversity. John Long, a palaeontology professor, emphasizes the resilience and longevity of sharks: “Sharks are 465 million years old. [...] They had to survive all five of Earth's major mass extinctions” (45:20). This segment underscores sharks' adaptability and their pivotal role in marine ecosystems.
Jade Elcock from the Woods Hole Oceanographic Institute expands on the vast diversity within shark species: “There are sharks in the tropics, there's sharks in the Arctic. [...] It almost makes the white shark seem boring” (50:10). The discussion highlights the incredible range of sizes, behaviors, and adaptations among sharks, painting a picture of these creatures as anything but monolithic predators.
Returning to the personal narratives, Rachel reflects on the profound impact of the cage dive: “It was a beautiful. You're looking at a prehistoric beast millions of years old” (55:00). This encounter bridges the gap between fear instilled by media and the genuine respect for sharks as living embodiments of evolutionary success.
The hosts wrap up by reaffirming their appreciation for sharks, challenging listeners to reconsider preconceived notions: “I love knowing that you poured gallons of blood into the water and didn't see the sharks” (60:00). This statement serves as a metaphor for understanding and valuing the unseen and misunderstood aspects of nature.
"The Cage" masterfully intertwines personal adventure with scientific exploration, offering listeners a multifaceted perspective on great white sharks. Through engaging storytelling and expert commentary, Radiolab demystifies these apex predators, presenting them as vital, enduring inhabitants of our oceans deserving of both respect and conservation.