Researchers examined the photographs of 150 Major League Baseball players who had appeared in the 1952 Baseball Register and had died by 2009.Those who lived an average of 80 years rather than 73 years were distinguished by their

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The researchers found that the players who lived an average of 80 years rather than 73 years had bigger smiles in their photographs. This suggests that emotional positivity and social connection may be factors that contribute to longevity. Height, muscularity, and skin color did not show a significant correlation with lifespan in this study.

Researchers Examined the Photographs of 150 Major League Baseball Players