The human tongue has a unique surface pattern, much like fingerprints, which can be used for biometric identification. This "tongue print" is distinct for each individual and remains stable over time, making it a potential tool in security and healthcare applications. Additionally, the common belief that specific taste zones exist on the tongue (e.g., sweet at the tip) is a debunked myth—the entire tongue detects all basic tastes, though certain areas may have slight variations in sensitivity.