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New study deconstructs Dunbar s number

An individual human can maintain stable social relationships with about 150 people, not more. This is the proposition known as Dunbar s number - that the architecture of the human brain sets an upper limit on our social lives. A new study from Stockholm University indicates that a cognitive limit on human group sizes cannot be derived in this manner.

Dunbar s number debunked: Research suggests you can have more than 150 friends

Dunbar s number debunked: Research suggests you can have more than 150 friends By (0) New research suggests it s impossible to pinpoint the human brain s maximum capacity for social relations, contrary to the concept of Dunbar s number which was based on non-human primates. File Photo by Monkey Business Images/Shutterstock New research suggests it s impossible to pinpoint the human brain s maximum capacity for social relations, contrary to the concept of Dunbar s number which was based on non-human primates. Photo by Johan Lind/N/Stockholm University May 5 (UPI) If you want to have more than 150 friends, you can new research says not to let the British anthropologist Robin Dunbar stop you.

Operationalizing niche construction theory with stone tools by Radu Iovita, David R Braun et al

Abstract One of the greatest difficulties with evolutionary approaches in the study of stone tools (lithics) has been finding a mechanism for tying culture and biology in a way that preserves human agency and operates at scales that are visible in the archaeological record. The concept of niche construction, whereby organisms actively construct their environments and change the conditions for selection, could provide a solution to this problem. In this review, we evaluate the utility of niche construction theory (NCT) for stone tool archaeology. We apply NCT to lithics both as part of the “extended phenotype” and as residuals or precipitates of other niche-constructing activities, suggesting ways in which archaeologists can employ niche construction feedbacks to generate testable hypotheses about stone tool use. Finally, we conclude that, as far as its applicability to lithic archaeology, NCT compares favorably to other prominent evolutionary approaches, such as human behavioral

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