Sylkat wrote:
Two thirds of humans who ever lived are alive now.
That's what I thought too, and there are certainly more people living now than have ever lived
all together at once...
But, if you consider how much of human history there has been, and how short human lifespans have been / how cheap life used to be... and thus how fast generations used to pass, large populations in history that have been decimated by war, genocide or disease etc. etc., then you come up with a number more like this:
108 billion individual human beings (homo sapiens) have lived on earth at one time or another.
Source:
http://articles.washingtonpost.com/2011 ... -explosion