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en.wikipedia.org/wiki/World_population

In demographics, the world population is the total number of humans currently living. The world ... One of many independent mathematical models supports the lower estimate, while a 2014 estimate forecasts between 9.3 ... Estimates on the total number of humans who have ever lived range in the order of 106 to 108 billion.

www.prb.org/Publications/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx

(October 2011) The question of how many people have ever lived on Earth is a ... Any estimate of the total number of people who have ever been born will ...

fivethirtyeight.com/features/what-are-the-demographics-of-heaven

Oct 14, 2015 ... He is one of many people looking to estimate a slightly different figure: the number of people who have ever lived, rather than the number of ...

bigthink.com/paul-ratner/how-many-people-have-ever-lived-on-planet-earth

It's easy to think that our lifetime and the world around us is unique and definitive. But thinking about how many people have ever lived on this planet can add ...

www.ncbi.nlm.nih.gov/pubmed/12288594

PIP: An estimate of the total number of persons who have ever lived on earth depends on two factors: 1) the length of time humans have been on earth; and 2)  ...

www.bbc.com/news/magazine-16870579

Feb 4, 2012 ... It is often said that there are more people alive today than have ever lived ... The problem is, how do you calculate how many have ever lived, ...

blogs.discovermagazine.com/fire-in-the-mind/2013/08/11/how-many-people-ever-lived

Aug 11, 2013 ... It is still common to hear that more people are alive today than have ever lived. Or an even more extreme claim: that 75 percent of everyone ...

www.quora.com/How-many-human-beings-have-ever-lived

[math]~10^{11}[/math], or 100 billion, is a number that floats around. It's usually uncited Carl Haub, or sometimes Tom Ramsey. Yet Haub's number (108 billio...