Oldest-known whale song recording provides new insight into ocean sounds - The Guardian

Marina: Welcome to Deep Voices — I'm so glad you're here. I'm Marina, a marine biologist and science communicator, and this is the show where we dive into the world of whales and dolphins — their songs, their cultures, their bonds, and the extraordinary science working to understand what they're actually saying. Marina: Before we dive in, a huge thank you to today's sponsors — Ada, who helps businesses integrate A I into their workflows in meaningful, practical ways; Ago Consulting — that's "Ahh-Go" — silicon development experts working across everything from A I to SoC; and Zen Semiconductor, an umbrella company with a whole portfolio of businesses across the silicon industry. We couldn't make this show without them. Marina: And today — oh, today is a good one. We've got the oldest known recording of whale song, and what it's teaching us about how the ocean has changed. We're going to talk about a genuinely wild idea — that decoding whale language could give whales legal rights. And we're heading to the Bahamas, where a grad student is spending her days in the water with wild dolphins. Let's go. Marina: So — VOICES OF THE DEEP. Let's start here, because this one genuinely stopped me in my tracks when I read it. Marina: Imagine you're a researcher, digging through old archive material — tapes, reels, recordings that have been sitting in storage for decades. And you come across something remarkable. A recording of whale song. Not just any recording — the oldest known recording of whale song in existence. Marina: That's exactly what happened, and The Guardian recently covered the story. This recording dates back to the 1950s — long before most people even knew that humpback whales sang. Long before Roger Payne and Scott McVay published their landmark 1971 paper in Science that told the world, hey, these animals are making complex, structured, repeating sequences of sound. Before that paper, the idea that a whale might be singing — genuinely composing something — would have seemed almost fanciful to most scientists. Marina: So this archival recording is a window into a world that very few humans ever got to hear. And here's the thing that makes it scientifically precious — it's not just a curiosity. It's a baseline. It gives researchers a point of comparison. A before. Marina: Because the ocean is not the same place it was in the 1950s. It is louder — dramatically louder. Shipping traffic, sonar, offshore drilling, the constant mechanical hum of industrial civilization bleeding into the sea. And whales — who depend on sound the way we depend on sight — have had to adapt. Marina: Research over the years has shown that some whale populations have shifted the frequency of their calls in response to noise pollution. Blue whales, for instance, have been recorded calling at lower frequencies over recent decades — some researchers think this may be a response to changing ocean acoustics, though it's complex and still debated. Humpbacks, meanwhile, are constantly updating their songs — males in a population will adopt new phrases and motifs that spread like a wave across ocean basins. Marina: So when you have an old recording — a real, dateable snapshot of what a whale sounded like in a quieter ocean — you can start asking genuinely important questions. How have the songs changed? Have the frequencies shifted? Is the structure different? Are there phrases that have been lost, or gained? Marina: It's a bit like finding a field recording of a forest from the 1950s and being able to compare it to the forest today. Except the forest is the whole ocean, and the singers are the largest animals that have ever lived on this planet. Marina: And I think there's something quietly moving about that. Somewhere in an archive, on a reel of old magnetic tape, is the voice of a whale from seventy years ago. A whale that is almost certainly long gone now. But its song survives. And it still has things to teach us. Marina: Okay. Let's move into our second thread — CULTURE AND DECODING — because this is where things get genuinely extraordinary. Marina: So here's a question I want you to sit with for a moment. What would it mean to decode whale language? Not just to record it, not just to say "that click pattern signals danger" — but to actually understand it, the way you understand a sentence in a foreign language you've learned. To know what a sperm whale is communicating to another sperm whale, in real time, with nuance and context. Marina: Boing Boing recently ran a piece on exactly this, and the headline was striking — decoding whale language could unlock new legal rights for them. And that sentence contains two enormous ideas. Let's take them one at a time. Marina: First — the decoding. This is where A I comes in, and where a project called Project CETI is doing some of the most ambitious science on the planet right now. CETI stands for Cetacean Translation Initiative, and their focus is on sperm whales. Sperm whales communicate using clicks — rapid sequences called codas — and they're extraordinarily social animals. They live in matrilineal clans. They have dialects. Different groups of sperm whales use different coda patterns, and calves learn their group's dialect from the adults around them. That is culture. That is learned, transmitted, social behavior. Marina: What Project CETI is trying to do is build a large enough dataset of sperm whale vocalizations — with enough context about who is speaking, to whom, in what situation — that machine learning models can start to find structure. To find the grammar, if there is one. To find whether certain codas appear together in predictable ways. To find meaning. Marina: They're deploying underwater listening arrays, bio-logging tags on individual whales, even camera systems — trying to capture not just the sound but the social context. Who clicked? Who responded? What was happening in the group at that moment? Marina: It's the same basic approach that cracked a lot of human language mysteries — you gather enough data, you look for patterns, and patterns reveal structure. The question is whether sperm whale codas have enough complexity and contextual variation to constitute something we'd recognize as language. And we genuinely don't know yet. The scientists involved are careful about this. They're not claiming whales have language in the human sense. They're asking the question rigorously and openly. Marina: But here's where the second big idea comes in — the legal rights question. Because if you could demonstrate, scientifically, that whales have a communication system with the complexity and intentionality we associate with language — what does that mean for how we treat them? There are legal scholars and philosophers who argue that personhood, and the rights that come with it, shouldn't be tied exclusively to being human. That what matters is cognitive complexity, social bonds, the ability to suffer, perhaps the ability to communicate meaningfully. Marina: The Great Whale Conservancy, the Non-Human Rights Project, and others have been making versions of this argument for years. And while no court has yet granted a whale legal personhood, the conversation is alive and serious. Some legal systems are already beginning to extend rights to rivers, to forests — to non-human entities that matter. The idea that a whale might one day have a legal right not to be harassed by a ship, backed by scientific evidence of its communicative personhood — that's not science fiction. It's a live debate. Marina: And I find that genuinely breathtaking. The science and the ethics are moving together, and where they land could change everything. Marina: Now — our third thread. A CETACEAN-AND-PEOPLE STORY. And this one takes us somewhere sun-drenched and beautiful. Marina: Florida Gulf Coast University — FGCU — has a grad student who is doing something that sounds almost impossibly wonderful as a job description. She's studying wild dolphins in the Bahamas. In the water. With them. Marina: The research site she's working at is in the tradition of long-running, direct-observation dolphin studies — the kind where researchers spend years building relationships with specific individuals, learning to recognize them, tracking their social lives across seasons and years. Atlantic spotted dolphins in the Bahamas have been studied this way for decades, and what those studies have revealed is staggering. Marina: These dolphins have names — well, researchers give them names and ID numbers, but the dolphins themselves likely have something equivalent. Studies have shown that bottlenose dolphins, close relatives, use signature whistles — unique, individually distinctive calls that function like names. They use them to announce themselves. They use them to call to specific individuals. When a dolphin is separated from a companion, it will often emit the companion's signature whistle — essentially calling out their name. Marina: That's not a metaphor. That's a documented behavior, replicated across multiple research groups. Dolphins address each other by name. Marina: And the social world that a researcher enters when she slips into the water with a Bahamian dolphin community is not a simple one. There are alliances and rivalries. There are juveniles learning the rules of the group. There are mothers teaching calves. There are play behaviors that look, to any honest observer, like joy. Marina: What makes this kind of long-term, in-water research so valuable is the continuity. You can watch a calf born and track its development over years. You can see how it learns, who it spends time with, what behaviors it acquires. You can document the transmission of knowledge across generations. That's culture — not instinct, not genetics, but learned behavior passed from individual to individual, mother to calf, elder to juvenile. Marina: And there's something about the human side of this story that moves me too. A grad student — probably in her twenties, probably working long hours for modest pay, probably spending her days doing something most people only dream about — choosing to dedicate her early scientific career to understanding these animals. To listening. To watching. To being present in their world with patience and respect. Marina: That choice matters. Science needs people who are willing to do the slow, careful, years-long work of truly knowing a wild animal community. Not just measuring it from a boat, but understanding it as a living social world with its own logic and its own relationships. Marina: The dolphins in the Bahamas don't know they're being studied, of course. But they tolerate the researchers, and in some cases seem genuinely curious about them. There are accounts — well-documented, observed by multiple researchers — of dolphins approaching humans underwater and initiating interaction. Bringing objects. Engaging. Watching back. Marina: When an animal looks at you and you look at it, and there's something there — recognition, curiosity, awareness — that's not nothing. That's not an illusion. And it's why people like this FGCU grad student do what they do. Marina: Alright. We're reaching the end of today's episode, and I want to leave you with this. Marina: The ocean is full of voices. Ancient voices — voices that predate human civilization by millions of years. Voices that carry across entire ocean basins. Voices encoded in songs that change and travel, that are learned and taught, that mean something to the animals singing them. We are just beginning — just barely beginning — to understand what those voices are saying. And the tools we now have, from hydrophone arrays to A I, from decades of field work to archival recordings on old magnetic tape, are bringing us closer than any generation of humans has ever been. Marina: This is Deep Voices, brought to you by Ada, Ago Consulting, and Zen Semiconductor — partners who believe that understanding the world, in all its depth, is worth the work. Marina: If today's episode moved you or made you curious, please subscribe, share it with someone you think would love it, and check the link in show notes for more on every story we covered today. I'm Marina. Stay curious. Stay in wonder. And keep listening to the deep.