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Humans inhabit every continent including [[Antarctica]], with a total population of over 6.5 billion as of 2007.

Humans inhabit every continent including [[Antarctica]], with a total population of over 6.5 billion as of 2007.

A roughly consistent growth rate for human population over time suggests a a population of merely a handful of human ancestors as of 5,000 or so years ago.  Atheists seeking to disagree with the Bible have advocated a wide variety of other dates of origin, such as 130,000 years ago.<ref>Alemseged Z, Coppens Y, Geraads D (2002). "Hominid cranium from Omo: Description and taxonomy of Omo-323-1976-896". Am J Phys Anthropol 117 (2): 103-12.</ref>.

Although animals which could be considered human have existed for about 2 million years, modern humans did not form until around 100,000 years ago in Africa. Once they evolved into their modern form, ''Homo sapiens'' replaced other species of human in Asia (''Homo erectus'') and Europe (''Homo neanderthalensis'').

== Characteristics ==

== Characteristics ==