This internship investigates locomotion in granular media such as sand, a highly complex material that can exhibit both solid- and fluid-like behaviors. Drawing inspiration from animals like snakes, lizards, and clams, the project aims to experimentally analyze their movement strategies and quantify their efficiency in controlled environments. By designing and testing bio-inspired robotic models, the research seeks to identify the physical principles that govern interactions between moving bodies and granular substrates, contributing to a deeper understanding of granular mechanics and locomotion physics.