Global life expectancy has risen from around 32 years in 1900 to more than 73 years today. Life expectancy was once extremely low because millions of children died from infections, malnutrition, unsafe water, and poor sanitation before reaching adulthood. Diseases like tuberculosis, cholera, pneumonia, and smallpox were widespread, while vaccines and antibiotics did not yet exist. Advances in medicine, hygiene, nutrition, and public health transformed human survival and doubled average lifespan within just over a century. MLA Sources: 1. Roser, Max, et al. “Life Expectancy.” Our World in Data, ourworldindata.org/life-expectancy. 2. Herre, Bastian. “Global Average Life Expectancy Has More Than Doubled Since 1900.” Our World in Data, ourworldindata.org/data-insights/global-average-life-expectancy-has-more-than-doubled-since-1900. Want more interesting content like this ? Follow gravitonomy :) Via : Ourworldindata No copyright infringement intended. Kindly DM for Rem...