The Living World Never Runs Out of Questions

I remember a time when I used to look at a heart cell under a microscope and feel a quiet thrill, not just because it was alive, but because it was doing something. Communicating. Deciding. Responding. Beating in a plate.

That feeling of being let into a secret mission is what Zoology gave me, and it has never really gone away.

When I started out, zoology to me meant animals, their forms, their behaviors, their names. That is where most of us begin. But as I went deeper, I realized the field had been quietly holding something much larger. Within every organism is a molecular story. Within every behavior is a cellular decision. Within every disease is a signaling pathway that either worked or did not.

My own path took me from Karur to Coimbatore, Coimbatore to Chennai, from Chennai to Spain, and eventually back, carrying questions that kept getting more interesting the more I tried to answer them. I spent years looking at how voltage-gated calcium channels influence cell death and autophagy, how cancer cells rewrite their own survival instructions, and how the immune system learns to recognize what belongs and what does not.

Along the way, I researched, wrote, collaborated, and failed at experiments more times than I can count. I learned that science is not a straight road. It loops, doubles back, and occasionally takes you somewhere you were not expecting to go. That is, in fact, the best part.

But if I am honest, the moment that shifted something deeper in me did not happen in a laboratory. It happened in Tanzania.

I went there as part of an academic exchange, which took me far outside the controlled world of pipettes and culture plates and into communities where disease was not a research problem to be solved. It was simply life, pressing in from every direction.

What I saw stayed with me. Communicable diseases that we discuss in textbooks, diseases with known pathogens, known transmission routes, and known interventions, were still claiming lives, quietly and preventably, because the distance between what researchers knew and what communities understood was vast.

“I had spent years studying how cells signal each other. But here was a different kind of signalling issue — between science and the people it was supposed to serve.” — Reflection from Tanzania

I also saw something that humbled me: local researchers working with far fewer resources than I had ever had access to, asking the same rigorous questions, driven by the same stubborn curiosity, but with an urgency to save their communities. They belonged to those communities, and that closeness gave their work a gravity I had not quite encountered before.

Tanzania taught me that research without reach is incomplete. That awareness is not a soft add-on to science; it is part of the work.

I came back a different kind of researcher—more restless about impact and more attentive to who sits outside the room where science is discussed.

Here is what I want to say to anyone who is standing where I once stood, wondering if Zoology is worth it:

The world right now is urgently asking questions that only biology can answer. How do pathogens evade immunity? How do we develop antimicrobial materials that do not poison the environment? How do we understand and prevent cancer? How do we close the gap between what science discovers and what communities actually experience?

These are not abstract questions. They are being answered in laboratories, field stations, hospitals, industries, and villages far from university campuses. At the heart of many of those answers is someone who once studied an animal, a tissue, or a cell and simply asked, “Why does it do that?”

Zoology is not a narrow path. It opens into immunology, biotechnology, pharmacology, environmental science, food science, biomedical research, and public health. It teaches you to observe carefully, think in systems, and hold uncertainty without flinching.

It also, if you let it, takes you places you did not plan for, and those unplanned places tend to be where the most important lessons live.

“The living world does not wait for us to catch up. It keeps evolving, adapting, surprising us. That means our questions never run out.” — A Message to Young Biologists

I often tell my students that the most important tool they will ever carry is curiosity—a stubborn, patient kind that survives disappointing results and slow progress. The kind that keeps asking questions not just for marks, but for understanding.

Zoology trained mine. It gave me a language for the living world, at the cellular level, at the community level, and at every scale in between. That language has taken me further than I expected when I first looked through that microscope in college.

The living world is still full of secrets. We have not come close to running out of things to find, or people to find them for.