Joshua Plotnik’s 20-year quest to understand the elephant mind - The Johns Hopkins News-Letter

Amara: Welcome back to The Long Memory — I'm Amara, elephant biologist, science communicator, and the person who genuinely tears up every time I watch a herd greet each other after time apart. If you're new here, this show is about the inner lives of elephants — their memories, their feelings, their families, and the science that keeps revealing just how extraordinary these animals are. Before we dive in, a warm thank you to the sponsors who make this possible: Ada, who helps organizations integrate A I into their real-world workflows in ways that actually stick; 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 shaping the future of the silicon industry. We are grateful for every one of them. Today on the show — a researcher who's spent twenty years chasing the question of what it's like to be an elephant; new science on whether elephants know when you're watching them — spoiler, they absolutely do; and we're going to talk about sound, and how elephant families tune their voices to each other in ways that will make you reconsider what a chorus really means. Let's get into it. Amara: Okay, so — the mind of the elephant. I want to start with a man named Joshua Plotnik, because his story is the kind of scientific origin story I wish we told more often. Plotnik is a comparative psychologist, now with affiliations including Hunter College, and he has spent the better part of twenty years asking one deceptively simple question: what are elephants actually thinking? And I say deceptively simple because the moment you try to answer it rigorously — the moment you try to design an experiment that gets inside an elephant's perspective rather than just projecting your own — things get very complicated very fast. His early work, back in the mid-2000s, tackled self-recognition. The mirror test. You've probably heard of it — it's one of the classic benchmarks for what researchers call self-awareness. The idea is straightforward: you place a large mirror in front of an animal and you watch. Does the animal treat the reflection as another animal, or does it seem to understand that it's looking at itself? Great apes pass. Dolphins pass. And Plotnik's work showed that Asian elephants pass too. One female in particular — named Happy, at the Bronx Zoo — repeatedly touched a mark that had been painted on her own forehead while looking in the mirror. Not the mirror, not another elephant. Her own forehead. That is not a small thing. That's an animal with a concept of self. But here's what I love about Plotnik — he didn't stop there and declare victory. He kept asking harder questions. He moved into cooperation studies, where he showed that elephants could solve problems together — problems that required two animals to pull on ropes simultaneously, problems that neither could solve alone — and that they understood the role their partner played. They would wait for each other. One elephant would even stand on her rope, holding it in place, so her partner could pull. That's not instinct. That's coordination with understanding. And more recently, his work has looked at how elephants understand human intentions, human gestures, human social cues. Twenty years of questions, each one pulling the thread a little further, and every answer revealing something richer than anyone expected. What I keep coming back to is this: Plotnik didn't go in expecting to confirm that elephants were smart. He went in to find out. That's the kind of science that changes things. Amara: And that brings me to something that just came out of new research that I find genuinely arresting — the question of whether elephants know when you're watching them. I don't mean just that they notice you're there. I mean — do they understand the concept of visual attention? Do they distinguish between a human who can see them and a human who cannot? This matters enormously, because understanding another being's attention — knowing what they can and can't perceive — is a sophisticated cognitive skill. In humans it's part of what's called a theory of mind, this ability to model what's going on in someone else's head. And research published through Phys.org detailed work showing that elephants do appear to track human gaze and visual orientation in meaningful ways. When a person's eyes and face are directed toward an elephant, the elephant behaves differently than when that same person's back is turned or their eyes are covered. They're more cautious. They adjust. They seem to understand that being watched and not being watched are fundamentally different states. Now, I want to be careful here, because this kind of research is genuinely hard to do cleanly — you want to rule out every other cue, every smell, every subtle body language signal, before you start making claims about what an animal understands versus what it's just responding to. But the findings are consistent with everything else we know about elephant cognition. These are animals that live in complex social groups, that have to track the intentions and emotional states of dozens of individuals over decades. Reading attention — knowing who is paying attention to you and who isn't — is exactly the kind of skill you'd expect them to have. And there's a real-world implication here too. In human-elephant conflict zones, elephants often behave very differently around people depending on the context — more boldly at night, more cautiously in daylight. For a long time we assumed that was just about visibility. This research suggests it might be something more. That elephants aren't just tracking light levels. They're tracking you. Amara: Now let's talk about the heart of the herd — and I want to go somewhere that might surprise you. Sound. Specifically, the way elephants use their voices not just to communicate, but to belong. Research published in Nature looked at what happens acoustically when elephants come together in large groups — the kind of joyful, chaotic reunions you see when two family units meet at a waterhole, or when a herd reassembles after a separation. And what the researchers found is something called acoustic convergence. Here's what that means. When elephants are in these positive social contexts — greeting, playing, reuniting — their calls start to resemble each other. The acoustic properties of their rumbles, their contact calls, shift toward a shared middle ground. They start to sound more alike. Now, acoustic convergence is something we've documented in humans — we unconsciously mirror the accents and speech patterns of people we're close to, people we like, people we're bonding with — and it turns out elephants may be doing something similar. The paper also found that the social context itself — who is there, what the emotional tenor of the gathering is — shapes the calls in measurable ways. This isn't just noise. This is elephants narrating their social world to each other, in real time, using their voices. And when you think about what an elephant's social world actually is — a matriarchal family led by the oldest, most experienced female, embedded in a larger clan, nested within a population that maintains bonds over decades and across vast distances — the idea that they're constantly tuning their voices to each other starts to feel less like a quirky finding and more like a window into something profound. They are literally harmonizing. Not in the musical sense, but in the deepest social sense. Coming into resonance with the beings they love. I think about that a lot. Amara: And I want to say a little more about memory here, because it is the heart of everything I study, and new reporting in The Times of India does a lovely job of pulling together what the science actually says — so let me give you my version of it. The phrase "elephants never forget" is one of those clichés that turns out, when you look at the evidence, to be surprisingly close to the truth. Elephants have the largest brain of any land animal. Their hippocampus — the brain region most critical to memory formation and retrieval — is exceptionally well-developed. But what's really striking isn't the hardware, it's the software. It's what they remember and why. Matriarchs — the eldest females who lead family groups — have been shown to remember the calls of individual elephants they haven't heard in over a decade. In studies by Karen McComb and her colleagues in Amboseli, researchers played back the contact calls of elephants who had died or been separated from the group years earlier. The family responded. They recognized the voice. They oriented, they called back, some approached. Over a decade. That's not a faint impression — that's a vivid, functional memory of a specific individual. And matriarchs who were older, who had lived through more, who had accumulated more social knowledge — those matriarchs made better decisions for their herds during droughts, during encounters with rival groups, during human disturbance. Their memory wasn't nostalgia. It was survival. The herd's survival. This is why poaching is so catastrophically destabilizing — it doesn't just remove an individual, it destroys an irreplaceable archive. A matriarch who's lived for fifty years carries fifty years of knowledge about where the water is when the rains fail, which humans are safe and which are not, which families are allies. You cannot replace that. You cannot download it. It lives in her, and when she's gone, it's gone. Amara: Okay — our elephant-and-people story today comes from a place where elephants and people are navigating something genuinely difficult, and I think it deserves careful attention rather than easy reassurance. Reports have been coming out of the Maharashtra-Telangana border region in India about a herd of elephants moving through areas they don't typically frequent — and the movement has been causing real alarm in local communities. I want to talk about this, because it would be easy to frame this as a conflict story, a danger story, and leave it there. But I think there's something more interesting and more important happening. Elephants in India are under enormous pressure. Habitat loss, fragmentation, the shrinking of traditional corridors — all of it is compressing the space these animals have to move through. And elephants, as we've established, have extraordinary memories for landscape. They remember migration routes their grandmothers used. When those routes are cut off, when a forest becomes a field becomes a town, herds don't just stop moving. They find the edges. They probe. They look for a way through. The movement along the Maharashtra-Telangana border is almost certainly not random. These animals are navigating a landscape that has changed faster than their ancestral memory can account for. And the people in those communities — farmers, families in villages near the forest edge — are genuinely frightened, and their fear is legitimate. People have been injured and killed in human-elephant encounters in India. This is not abstract. What I keep coming back to is that the elephants and the people in these situations are both responding rationally to an environment that has been made irrational by habitat destruction and fragmentation. The elephants are following their nature. The people are protecting their homes. The failure is in the systems — the land-use decisions, the development patterns, the inadequate investment in conflict mitigation measures — that put them in the same shrinking space. There are solutions. Wildlife corridors work. Early warning systems work. Community-based conservation works. But they require us to hold two truths at once: that local people's safety matters, and that the elephants moving through the night are not villains. They're navigating a world that was remade without their consent. Amara: That's what I'll carry with me from today's episode. The idea that memory and mind and feeling — in elephants as in us — are always in conversation with the world around them. Joshua Plotnik spending twenty years learning how to ask the right questions. Elephants reading the direction of a human gaze. A herd of rumbling voices converging into something that sounds almost like harmony. A matriarch carrying fifty years of knowledge in the architecture of her brain. A herd moving through a border landscape at night, looking for a way through. All of it is connected. All of it is the long memory — reaching back, and forward, across time and species. This has been The Long Memory, brought to you by Ada, Ago Consulting, and Zen Semiconductor. If this episode moved you or taught you something, please subscribe wherever you get your podcasts, leave us a review, and share it with someone who needs to know that elephants are out there, remembering everything. Show notes with links to all the research and reporting we discussed today are in the link in show notes. Stay curious, stay kind — and I'll see you next time.