Theoretical biology is a multidisciplinary field that uses mathematical and computational models to study biological phenomena and make predictions about biological systems. It combines principles from biology, physics, mathematics, and computer science to understand complex biological processes, such as evolution, gene regulation, and ecological interactions. Theoretical biology aims to uncover underlying principles and patterns in living organisms and provide a deeper understanding of how biological systems function and evolve. Researchers in this field work on developing theoretical frameworks, constructing models, and testing hypotheses to advance our knowledge of biology.