In a groundbreaking study, Japanese scientists have developed a human skin equivalent that can be attached to robots to recreate realistic smiles. University of Tokyo researchers created a "robot covered with living skin" using a skin-forming cell-laden gel, as detailed in the journal Cell Reports Physical Science. The goal is to advance biohybrid robots to the point of resembling humans in both appearance and function. The innovative material represents a shift from conventional humanoid robots with silicone rubber skin to a more realistic, self-healing option. While the team hopes this development sheds light on wrinkle formations and facial expressions, they acknowledge the challenges ahead in achieving self-healing capabilities. Inspired by human skin ligaments, the scientists gelled the skin-like tissue to create a natural smile that moves fluidly. This cutting-edge research opens the door to new possibilities in robotics and cosmetic advancements.