Humans, or human beings, are
bipedal primates belonging to the
mammalian species Homo sapiens (
Latin: "wise man" or "knowing man") in the family
Hominidae (the great
apes). Compared to other living organisms on Earth, humans have a
highly developed brain capable of abstract
reasoning,
language, and
introspection. This mental capability, combined with an erect body carriage that frees their upper limbs for manipulating objects, has allowed humans to make far greater use of
tools than any other species.
DNA evidence indicates that modern humans originated in
Africa about 200,000 years ago, and they now inhabit every
continent,
with a total population of over 6.6 billion
as of 2007.
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