Humans are the only species to live in every environmental niche in the world – from the ice sheets to the deserts, rainforests to savannahs. As individuals we are rather puny, but when we are socially connected, we are the most dominant species on
shows these social connections were stronger and wider than we had thought among our ancestors who lived around 65,000 years ago, shortly before the large"out of Africa" migration in which they began to spread across the world.without this migratory success and without leaving any genetic trace among us today.
To address this question, archaeologists examine tools and other human-made objects that still survive today. We assume that the people who made those objects, like people today, were social creatures who made objects with cultural meanings.A small, common stone tool gave us an opportunity to test this idea in southern Africa, during a period known as thearound 65,000 years ago.
Importantly, this shows for the first time that social connections were in place in southern Africa just before the big"out of Africa" migration.in response to various environmental stressesThere is evidence the stone blades were often glued or bound to handles or shafts to make complex tools such as spears, knives, saws, scrapers and drills, and used as tips and barbs for arrows. They were used to process plant material, hide, feathers and fur.
If their proliferation was simply a functional response to changing conditions, then we should see differences in different environmental niches. But what we see is similarity in production numbers and artefact shape across great distances and different environmental zones.
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