In this engaging discussion, technology journalist Ed Gent shares insights on biometric authentication and the risks posed by AI-driven deepfakes. Health reporter Christine Yohannes explores innovative 'brain selfies' for concussion detection, raising ethical questions. Behavioural ecologist Adrian Schrader reveals how rhino dung serves as a complex biometric signal, unlocking secrets about their social lives. Together, they delve into the implications of biometrics on privacy, security, and conservation, highlighting the fascinating intersection of technology and nature.