X xo379 Guest Mar 4, 2008 #2 About 45-50 "In the developed countries, the fragmentary data that are available suggest that life expectancy at birth was around 35 to 40 years in the mid-1700s, that it rose to about 45 to 50 by the mid-1800s"
About 45-50 "In the developed countries, the fragmentary data that are available suggest that life expectancy at birth was around 35 to 40 years in the mid-1700s, that it rose to about 45 to 50 by the mid-1800s"
