The traditional Tahitian oven, known as the ahimā’a, is more than a culinary technique: it constitutes a real thermal technology, based on empirical knowledge. Its study allows for the intersection of food, environment, archaeology, and linguistics, by questioning, in particular, the resources used and the transmission of knowledge. The ahimā’a can thus become a "living laboratory," where traditional knowledge and scientific methods meet to better understand a Polynesian cultural practice. In the early morning, the fire is already lit. The stones are heating up on the wood. Around the oven, each person knows what they must do: choose the right stones, prepare the leaves, monitor the fire, determine when the food can be placed. Then comes the time to cover everything. For several hours, under this plant cover, the heat transforms the food. At first glance, nothing here resembles a laboratory. Yet, under a few tens of centimeters of leaves and soil, physical, chemical, and ecological phenomena occur simultaneously. It is this change of perspective that is proposed: to consider the ahimā’a not only as a heritage to preserve, but as an object to study. The principle seems simple: heat stones, then use the energy they have accumulated to cook the food in a closed space. In reality, several mechanisms combine. The heat passes from the stones to the food; the water contained in the plants and the food turns into steam; the cover slows down the exchanges with the outside. The cooking depends on a set of parameters: temperature, duration, humidity, nature of the stones, quantity of fuel and organization of the layers of the oven. Archaeological research on stone-heated cooking shows that these devices can store and gradually release large amounts of energy: a real thermal technology, even without instruments in the modern sense. Thus, the advice transmitted by practitioners becomes as many research questions. Why does a particular stone suit better than another? Does it withstand thermal shocks more? Certain types of wood produce more durable embers? What indicators allow to recognize that an oven is ready? Measurements would allow to compare these empirical observations with experimental data. The traditional gesture would no longer be placed against science: it would become the starting point of the investigation. The term mā’a tahiti is today very often associated with the dishes prepared in the Tahitian oven. However, it mainly refers to the traditional basic diet composed of a protein source, generally fish or meat, a starchy food, and a binder such as coconut milk. This mā’a tahiti is often associated with a local, natural, or healthy diet. This association deserves to be studied rather than assumed. Several emblematic foods of the mā’a tahiti (‘uru, taro, sweet potato, banana, fish) are today at the heart of programs to revalue local food systems. The United Nations Food and Agriculture Organization (FAO) highlights particularly the interest of a lesser dependence on imported products. This does not mean, however, that all traditional foods are automatically healthier, nor that all traditional cooking preserves nutrients better. Experiments conducted in Fiji on the lovo, another Oceanic earth oven, have shown that the retention of vitamins depends on both the food and the nutrient considered and the cooking method. That is precisely why the ahimā’a deserves to be studied experimentally. What temperatures does it reach, and how do they evolve during cooking? What happens to the water and certain nutrients? Does cooking wrapped in leaves produce the same effects as cooking in contemporary containers? What plants or types of wood contribute to the flavors and aromas of the foods cooked in the ahimā’a? The same caution applies when talking about ecology. Preparing an ahimā’a mobilizes wood, plants, stones, and food products. Their origin, availability, and renewal must be studied. Therefore, qualifying the oven as an "ecological technology" should not automatically attribute it an environmental virtue. The challenge is to understand how this technology functions in a given environment: what resources are chosen, in what quantities, according to what criteria and with what consequences? Sustainability then becomes a question of research, not a label. An ahimā’a is not only learned by observing the heat. It is also necessary to learn the words. The names of the stones, woods, leaves, foods, utensils, parts of the oven, and preparation steps constitute as many entry points to specialized knowledge. A language is not used only to name the world: in a technical practice, it also allows to classify, distinguish, and transmit what is observed. If a term distinguishes two types of stones, two states of fire, or two cooking moments, its disappearance does not represent only the loss of a word. It can make it more difficult to transmit a distinction refined by several generations of experience. This articulation between gestures, vocabulary, and knowledge makes the ahimā’a particularly interesting for research. In French Polynesia, recent operations have already collected from knowledgeable people the practices and lexicon associated with the earth oven. Archaeology also recalls that this Austronesian origin tradition, millennium-old, has long surpassed the sole culinary function. At ‘Opunohu, on Mo’orea, ovens have been identified in residential areas as well as in ceremonial and feast contexts: the oven is also a social infrastructure. Another Polynesian object has already experienced this change in status: the navigation canoe. Long considered mainly as an ethnographic object, it has become a scientific experimentation site. The journeys made aboard reconstructions of double canoes, notably Hōkūle’a, have contributed to renewing discussions on navigation knowledge and the intentional settlement of the Pacific. It is not about putting ocean navigation and food cooking on the same level. The comparison is on our perspective: an object transmitted by practice can contain scientific problems of remarkable complexity. Why should the ahimā’a not also have the right to this curiosity? This approach aligns with the concept of "ecology of knowledge" developed by the sociologist Boaventura de Sousa Santos (2011). It invites not to automatically oppose scientific knowledge and so-called non-academic knowledge, but to examine their relevance domains, their limits, and the conditions of their encounter. It is neither to assert that all traditional knowledge is necessarily scientific, nor to consider that academic sciences can alone explain the entirety of a cultural practice. The question is more fertile: what happens when the knowledge of the practitioners meet the instruments and methods of researchers? An experienced person knows that a stone is suitable for the oven; the geologist can study its composition and its behavior under the effect of heat. The oven manager recognizes certain signs indicating that it is ready; the physicist can record a temperature curve. A speaker knows the precise term designating a leaf, a gesture, or a step; the linguist can document this vocabulary and study its transmission. These knowledge do not say exactly the same thing. It is precisely this that makes their meeting fertile. My interest in this object lies in this double proximity: that of a familiar Polynesian cultural practice and that of a researcher who wishes to question it with the tools of the humanities while opening a dialogue with experimental sciences. Being a "researcher from the inside" does not exempt from the scientific method. It rather obliges to question what familiarity can make invisible. Measuring the temperature of the stones, identifying the plants, comparing the foods before and after cooking, recording the words used, documenting the variations between families and between islands: so many leads to transform a familiar practice into an interdisciplinary research program. On the occasion of the Science Festival 2026 and its theme "Scientific Flavors", the ahimā’a invites us to look differently at what is already under our eyes - or rather under our feet. For under the leaves and the hot stones not only food is cooked. Also transmitted are ways of observing, naming, and understanding an environment.