Hans Selye was a pioneering endocrinologist known for his groundbreaking research on stress and its effects on the body. His studies led to the formulation of the General Adaptation Syndrome (GAS), a model describing how the body responds to stress in three stages: alarm, resistance, and exhaustion. Selye's work highlighted the physiological responses to stress, linking it to various health issues, ultimately contributing to the field of psychoneuroendocrinology. Selye's theories emphasized that while stress...