Robert M. Sapolsky
While zebras only experience stress when running from a lion, modern humans suffer from chronic psychological stress that gradually takes a physical toll on the body.
The physiological stress response diverts energy from long-term projects like digestion and tissue repair to immediate survival mechanisms.
Chronic stress damages the cardiovascular system by wearing out blood vessels and increasing the risk of heart disease.
Prolonged exposure to stress hormones shrinks the hippocampus and severely disrupts your ability to form and retrieve memories.