Vital Signs 🫀 on Instagram: "Can We Grow Human Ears on Mice? Wild Science Explained . . Tissue engineering combines scaffolds, cells, and growth factors to regrow structures like ears. Classic “ear mouse” experiments used cartilage cells on bio-scaffolds under mouse skin to shape auricles. Today, 3D printed biodegradable scaffolds seeded with patient cells aim to reduce rejection and improve aesthetics for microtia or trauma. Ethical oversight and rigorous safety testing remain essential