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Post  tranthuongbn on Tue Jan 04, 2011 6:12 am

The earliest humans probably lived primarily on scavenging, not actual hunting. Early humans in the Lower Paleolithic lived in mixed habitats which allowed them to collect seafood, eggs, nuts, and fruits besides scavenging. Rather than killing large animals themselves for meat, they used carcasses of large animals killed by other predators or carcasses from animals that died by natural causes.[3]
Hunting and gathering was presumably the subsistence strategy employed by human societies beginning some 1.8 million years ago, by Homo erectus, and from its appearance some 0.2 million years ago by Homo sapiens. It remained the only mode of subsistence until the end of the Mesolithic period some 10,000 years ago, and after this was replaced only gradually with the spread of the Neolithic Revolution.
Starting at the transition between the Middle to Upper Paleolithic period, some 80,000 to 70,000 years ago, some hunter-gatherers bands began to specialize - concentrating on hunting a smaller selection of (often larger than had previously been hunted) game and gathering a smaller selection of food. This specialization of work also involved creating specialized tools like fishing nets and hooks and bone harpoons.[4] The transition into the subsequent Neolithic period is chiefly defined by the unprecedented development of nascent agricultural practices. Agriculture originated and spread in several different areas including the Middle East, Asia, Mesoamerica, and the Andes beginning as early as 10,000 years ago.

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