The average age expectancy worldwide is 70. In doing research for a few posts ago I discovered that for most of human history the life expectancy was very low. For instance in ancient Rome it was between 20-30 years, in the Medieval Caliphite it was up to 35 and in the early 20th Century it was still very low at 30-40 years. Suddenly by today it has doubled. How? Well, lots of reason. Disease eradication. Low infant mortality (before the Industrial revolution the infant mortality rate was over 75% meaning 3 out of every four children would not live past five).
Our life expectancy is nothing short of a miracle. Yet to not know that shocks you when viewing the history of human life.
Check this out for more info on some health related stuff. Or the wikipedia article.
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