The unique bond that twins share is both emotional and physical. The close relationships that twins often share provide examples of ultimate human connection and compassion. And twin-based health research can provide us with insight into the human body that other groups of research participants could not provide; a pair of twins enables researchers to investigate identical human bodies noticing how environmental, dietary and other ‘variables’ affect and change the way in which they develop. The Department of Twin Research, King’s College London has expanded our knowledge of healthy ageing, helping to create a better, healthier world. Twin Tales attempts to capture the ‘twin thing’ in photographs of twins by Iringó Demeter, and recordings in which the twins talk openly about twinship, the human experience, and taking part in life-saving research.