Imagine being able to watch life take shape — not only in its final outcomes, such as a beating heart or a thinking brain, but in its very first, mysterious moments of organization.

Today, thanks to biotechnology and stem cell engineering, this vision is becoming increasingly real: a new class of multicellular systems derived from stem cells is revolutionizing the way we study tissue development and regenerative medicine.

This challenge has been embraced and advanced by VIMM and its Scientific Director, bioengineer and researcher Nicola Elvassore, who presented at the World Health Forum Veneto the first results and developments of a new generation of biological models: multicellular systems derived from stem cells that can mimic not only the structure but also the timing of human development.

These models recreate, step by step, how a tissue forms — just as it happens in the human body during embryogenesis. They are not real embryos, nor do they have the potential to develop fully, but they are realistic reproductions of specific stages of development, allowing scientists to observe processes that were previously inaccessible — such as the formation of the body’s first axes or the dynamic interactions between different cell types over time.

The potential applications are vast: studying congenital diseases before they manifest, testing new therapies on tissues engineered from a patient’s own cells, or even developing bio-inspired organs for transplantation.

But above all, this research seeks to answer a fundamental question: how does biological complexity arise from a single cell?

To do so, researchers are not simply “growing” cells — they are designing living miniature systems, where biology meets engineering and opens new frontiers not only for science, but also for personalized medicine.

In an era when technology can simulate almost anything — from the human voice to the universe itself — this work reminds us that real life, the life of cells, still holds profound mysteries waiting to be explored.