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Human evolution: Stature variation in the Neolithic.

Lara R Arauna1

  • 1Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain.

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Summary
This summary is machine-generated.

The Neolithic transition saw modest height reduction, mainly due to genetic ancestry shifts. Lactose tolerance helped mitigate this effect, challenging previous assumptions about agricultural impacts on human stature.

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Area of Science:

  • Paleogenetics
  • Human Evolution
  • Nutritional Anthropology

Background:

  • The shift to agriculture (Neolithic transition) is historically linked to decreased nutrition and health.
  • This nutritional decline is often correlated with a reduction in average human stature.

Purpose of the Study:

  • To investigate the factors contributing to stature changes during the Neolithic period.
  • To assess the relative influence of genetic ancestry versus nutritional factors on human height reduction.

Main Methods:

  • Analysis of ancient DNA to track genetic ancestry shifts.
  • Skeletal analysis to measure stature changes over time.
  • Statistical modeling to correlate genetic and anthropometric data.

Main Results:

  • The observed reduction in human stature during the Neolithic was modest.
  • Changes in genetic ancestry were identified as the primary driver of this height reduction.
  • Lactose tolerance emerged as a significant mitigating factor, counteracting some of the height decrease.

Conclusions:

  • Stature reduction during the Neolithic was not solely due to poor nutrition.
  • Genetic admixture played a more substantial role in altering average human height.
  • Lactose tolerance demonstrates a clear adaptive advantage influencing physical traits in agricultural societies.