Monaco has the highest life expectancy in the world. PhotoLondonUK/Shutterstock

Life expectancy varies across the world, largely due to environmental factors.

The World Bank Group ranked life expectancy in different countries around the world.

Monaco and San Marino reported the highest life expectancies, while Nigeria and Chad had the lowest.

Jeanne Calment was the oldest verified person to have ever lived, passing away at 122. She was born in 1875, just a decade after the US Civil War ended, and died in 1997, a year before Google launched.

Despite Calment's extraordinary longevity, her home country, France, ranks just outside the top 20 countries for life expectancy. In some parts of the world, however, living past 100 years old is the norm.

The World Bank Group collected data through 2023 on life expectancy at birth by country.…