Homo habilis is the first species for which we have positive evidence of use of stone tools.
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Homo habilis, which is considered the first member of the genus Homo, gave rise to Homo ergaster.
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Homo habilis is thought to be the ancestor of the lankier and more sophisticated Homo ergaster.
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Homo habilis may also have coexisted with Homo erectus in Africa for a period of 500,000 years.
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Homo habilis, the first human species, is never mentioned.
From the economist.com
Homo habilis had smaller molars and larger brains than the Australopithecines, and made tools from stone and perhaps animal bones.
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Homo habilis co-existed with other Homo-like bipedal primates, such as Paranthropus boisei, some of which prospered for many millennia.
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Homo habilis is assumed to have lived primarily on scavenging, using the tools to cleave meat off carrion or to break bones in order to extract the marrow.
From the en.wikipedia.org
Homo habilis has often been thought to be the ancestor of the more gracile and sophisticated Homo ergaster, which in turn gave rise to the more human-appearing species, Homo erectus.