Study Reveals Genetic Heritability Plays Major Role in Human Lifespan
A recent study published in the journal Science by biologists Uri Alon and Ben Shenhar from the Weizmann Institute of Science in Israel suggests that genetic heritability accounts for at least 55% of the factors influencing human lifespan. This figure is significantly higher than previous estimates, which suggested a much smaller role for genetics. The researchers analyzed data from twin studies and used mathematical models to separate intrinsic mortality (genetic factors) from extrinsic mortality (environmental factors). Their findings indicate that as extrinsic mortality decreases, the correlation between genetics and lifespan becomes more apparent, suggesting a stronger genetic influence than previously recognized. 
