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4 million years ago , biped , carnivore
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2 million years ago , biped , carnivore , bigger brain , tools
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1.8 million years ago , biped , carnivore , bigger brain , tools , fire
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lees than 500,000 years ago , biped , carnivore , bigger brain , tools , fire , burry the dead
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modern humans , biped , carnivore , brain , tools , fire , burry the dead , agriculture , communication