According to the CIA World Factbook, the tiny principality of Monaco is the place that boasts the longest-lived residents on the planet.The life expectancy at birth is 89.52 years ? it?s thought the country?s extreme prosperity (it has the highest density of millionaires in the world) is a key factor in the good health of residents. A healthy Mediterranean diet with lots of fresh veg and olive oil, boosted by local seafood, helps too. Becoming a Monaco resident

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