Underwater AI glider decodes sperm whale conversations in real time - Moneycontrol.com

Marina: Welcome to Deep Voices — I'm so glad you're here. I'm Marina, a marine biologist and science communicator who has spent way too many hours on research vessels in the dark, listening to the ocean, and honestly? I would not trade a single sleepless night for anything. Marina: Today's episode is a good one. We've got robotic gliders eavesdropping on sperm whale conversations in real time, new science suggesting sperm whales might make something like vowel sounds — yes, like the vowels in human language — and a story about dolphins and people that's going to make you think hard about what we owe the creatures we share this ocean with. Marina: Before we dive in, a huge thank you to today's sponsors. Ada — helping businesses integrate A I into their workflows in ways that actually make sense. Ago Consulting — that's "Ahh-Go" — silicon development consulting from A I all the way to SoC. And Zen Semiconductor — an umbrella company with a remarkable portfolio spanning the silicon industry. These are the kinds of companies building the tools that, in some cases, are literally helping us decode the voices of whales. So I'm grateful for them. Marina: Alright. Let's go deep. Marina: VOICES OF THE DEEP Marina: I want to start with something that stopped me in my tracks when I read it this week. Scientists have been studying sperm whales for decades — these magnificent, deep-diving giants, the largest toothed animals on Earth — and we've known for a long time that they communicate using clicks. Not just random clicks. Patterned sequences called codas. But here's what's new, and it's genuinely exciting. Marina: Research published recently in Scientific American suggests that sperm whales may be producing something analogous to vowel sounds. Now, when I say vowel sounds, I don't mean they're speaking English underwater. What researchers are finding is that sperm whales appear to modulate certain qualities of their clicks in ways that are structurally similar to how humans shape vowels — by changing the resonance, the filtering of sound through a vocal tract. In humans, vowels are shaped by the position of our tongue and the shape of our mouth, which changes which frequencies get amplified. In sperm whales, the anatomy is wildly different — they have this extraordinary organ called the spermaceti organ in their massive heads — but the acoustic principle, filtering and shaping sound to create distinct categories, may be doing something similar. Marina: And why does that matter? Because one of the things linguists and biologists look for when asking whether a communication system is language-like — and I want to be careful here, we're not saying sperm whales have language — but one of the hallmarks of complex communication is what's called duality of patterning. The idea that you have a small set of basic units — like vowels and consonants — that combine to make a much larger set of meaningful signals. If sperm whales have something like that, something like acoustic building blocks that they're combining and varying, that opens an extraordinary door. Marina: Sperm whales live in tight social groups, mostly females and their young. Adult males largely live solitary lives, coming together with females only to mate. And within those female-led clans, codas — those click patterns — are shared. Different clans have different coda repertoires. It's almost like a dialect. Researchers have documented this in the Caribbean, in the Pacific. A sperm whale from one clan sounds different from a sperm whale from another, even if they share the same ocean. Marina: So we're not talking about simple signals. We're talking about a rich, socially embedded, potentially building-block-based communication system that has been evolving over millions of years in brains that are larger than ours. That alone deserves a moment of quiet awe. Marina: CULTURE & DECODING Marina: Now here's where it gets even more incredible — because we don't just have better theories about sperm whale communication. We are now building robots to listen to them in real time. Marina: Reuters reported this week on an underwater robotic glider — imagine a sleek, torpedo-shaped machine moving silently through the deep ocean — that has been equipped with hydrophones and A I to detect, identify, and decode sperm whale codas as it travels. In real time. Not sending data back to a lab and waiting weeks. Right there, in the water, while the whales are talking. Marina: This is connected to a broader effort you may have heard me mention before — Project CETI, the Cetacean Translation Initiative. CETI is a genuinely ambitious, well-funded scientific project that brings together marine biologists, linguists, cryptographers, and machine learning researchers with one goal: to use A I to decode the communication of sperm whales. They're recording millions of codas. They're tagging whales with non-invasive biologging tags to capture not just sound but context — who clicked, who responded, what was the whale doing, where were the other whales. Because meaning, if it exists in these sounds, will only be findable if you know the situation. Marina: The approach borrows from natural language processing — the same field that gave us large language models and speech recognition. The idea is that if you have enough data, and if the communication system has structure, A I can find patterns that human ears and human brains simply cannot. A sperm whale coda might last less than a second. But within that fraction of a second, there are variations in the rhythm, the tempo, the rubato — a kind of expressive speeding up and slowing down — that researchers have shown are not random. They carry information. Exactly what information? That's what the A I is trying to help us figure out. Marina: And the robotic glider is crucial here because one of the biggest problems in cetacean research has always been access. Sperm whales dive to over a thousand meters. They spend most of their lives in deep water far from shore. Getting good recordings, in context, with enough behavioral data to make sense of them, is extraordinarily hard. A glider that can follow a social group, listen, and start building a contextual dataset in real time? That changes what's possible. Marina: I think about what it would mean — truly mean — if we cracked this. If we could sit with a group of sperm whale mothers and daughters and say, okay, that coda means something like "stay close" or "I found food" or something we don't even have a human word for yet. The philosopher Thomas Nagel famously asked what it is like to be a bat. We might one day have to grapple seriously with what it is like to be a sperm whale — a being who thinks in the dark, in three dimensions, in sound, with a brain that has structures associated with complex emotion. That's not science fiction. That's the direction this research is heading. Marina: A CETACEAN-AND-PEOPLE STORY Marina: I want to close our stories today with something that asks us to sit with some discomfort alongside some wonder — because that's part of loving these animals honestly. Marina: This week, PETA filed a complaint with the Federal Trade Commission against a dolphin facility in the Florida Keys. Now, I'm going to be thoughtful here, because these situations are genuinely complicated, and I want to give you facts, not just feelings. PETA's complaint centers on concerns about the conditions and treatment of dolphins at the facility — this is an ongoing and contested issue, and the facility involved disputes the characterizations. Marina: But I want to use this moment to talk about something real and important: the long, tangled history between humans and captive dolphins, and what science has taught us about why it matters so much. Marina: Bottlenose dolphins are among the most cognitively sophisticated animals on Earth. They pass the mirror self-recognition test — they recognize themselves in a mirror, which is considered a marker of self-awareness seen in very few species, including great apes, elephants, and humans. They have names for each other. Not metaphorical names — actual learned, individually distinct signature whistles that function like names. A dolphin will respond to its own signature whistle being played back the way you or I respond to someone calling our name across a room. Marina: They form alliances within alliances. Male bottlenose dolphins in Shark Bay, Australia, have been documented forming what researchers call "second-order alliances" — teams of teams — to compete for access to females. The social complexity required to navigate that is remarkable. They teach their young specialized foraging techniques — in the same Shark Bay, some mothers teach their daughters to use marine sponges as tools to protect their beaks while rooting in the seafloor. That behavior passes down matrilineal lines. That is culture. Marina: And so when we put a dolphin in a tank — even a large tank, even with enrichment — we are putting a being with a rich inner social life, a being who navigates kilometers of open ocean every day, who maintains long-term relationships, who may grieve, who communicates in ways we are only beginning to understand, into an environment that is by necessity a profound reduction of what their life is meant to be. Marina: That doesn't mean everyone who has ever loved a dolphin at a marine park is a bad person. Many people got their first spark of wonder about the ocean from those encounters. I understand that. But science has moved. Our understanding of who these animals are has deepened enormously. And as that understanding grows, the questions we ask about how we treat them have to grow too. Marina: The PETA complaint, whatever its legal outcome, is part of a larger cultural reckoning that has been building for decades — accelerated by documentaries, by research, and honestly by projects like the one we were just talking about. Because the closer we get to understanding what dolphins and whales are actually saying to each other, the harder it becomes to look away from what it means to keep them from saying it. Marina: There is no simple answer here. But there is a direction. And that direction is toward more knowledge, more respect, and more accountability — and I think that's right. Marina: OUTRO Marina: Every time I sit down to research one of these episodes, I come away with the same feeling — a kind of humbling, gorgeous vertigo. We share this planet with beings who have been communicating in complex, culturally rich, emotionally resonant ways for millions of years, in a medium we can barely hear, about things we are only just beginning to imagine. And we have the astonishing good fortune to be alive at the moment when the tools — the A I, the robotics, the biologging, the linguistics — are finally catching up to the mystery. Marina: Deep Voices, brought to you by Ada, Ago Consulting, and Zen Semiconductor. I am so grateful for their support, and so grateful for you — for showing up, for listening, for caring about these voices in the deep. Marina: If this episode moved you or surprised you, please share it with someone who loves the ocean, or someone who doesn't know yet that they do. Subscribe wherever you get your podcasts, and check the show notes — the link in show notes has everything we talked about today, so you can keep going down the rabbit hole. Marina: Until next time — stay curious, stay humble, and keep listening. The ocean has a lot left to say.