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A hunter-gatherer, was the ancestral subsistence mode of Homo, and all modern humans until around 10,000 years ago. Following the invention of agriculture hunter-gatherers have been displaced by farming or pastoralist groups in most parts of the world. Only a few contemporary societies are classified as hunter-gatherers, and many supplement, sometimes extensively, their foraging activity with farming and/or keeping animals.
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Why did huntergathers lead nomadic or traveling lives?
They followed the movements of animals.
What temporary land mass linking Siberia and Alaska is thought to have allowed huntergathers to migrate from Asia to north America?
The temporary land mass that linked Siberia and Alaska is known as Beringia, or the Bering Land Bridge. During the last Ice Age, lower sea levels exposed this land bridge, allowing hunter-gatherers to migrate from Asia to North America. This migration is believed to have occurred around 20,000 to 15,000 years ago, facilitating the movement of people and animals across the Bering Strait.
