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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). 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. Humans originated in Africa about 200,000 years ago, but now they inhabit every continent except Antarctica, with a total population of over 6.5 billion as of 2007.

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). 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. Humans originated in Africa about 200,000 years ago, but now they inhabit every continent except Antarctica, with a total population of over 6.5 billion as of 2007.