Optimism may promote emotional well-being by limiting how often one experiences stressful situations

A study of adults older than 50 (n = 21k) found: greater purpose in life, positive emotions, optimism, social support, and life satisfaction predicted lower mortality (1 SD increase in most measures of psychological well-being was linked with a 2–4 year increase in life expectancy at 50).

NASA’s OPTIMISM – Upgraded Perseverance Mars Rover Twin – Begins Terrain Tests