Editing Human variability (section)

=== Cultural factors ===
{{Expand section|date=February 2021}}
Archaeological findings such as those that indicate that the [[Middle Stone Age]] and the [[Acheulean]]<ref>{{cite news |title=Neanderthal and early modern human stone tool culture co-existed for over 100,000 years |url=https://phys.org/news/2021-03-neanderthal-early-modern-human-stone.html |access-date=18 April 2021 |work=phys.org |language=en}}</ref><ref>{{cite journal |last1=Key |first1=Alastair J. M. |last2=Jarić |first2=Ivan |last3=Roberts |first3=David L. |title=Modelling the end of the Acheulean at global and continental levels suggests widespread persistence into the Middle Palaeolithic |journal=Humanities and Social Sciences Communications |date=2 March 2021 |volume=8 |issue=1 |pages=1–12 |doi=10.1057/s41599-021-00735-8 |language=en |issn=2662-9992|doi-access=free }} [[File:CC-BY icon.svg|50px]] Available under [https://creativecommons.org/licenses/by/4.0/ CC BY 4.0].</ref> – identified as a specific 'cultural phases' of humanity with a number of characteristics – lasted substantially longer in some places or 'ended' at times over 100,000 years apart, highlight a significant spatiotemporal cultural variability in and complexity of the sociocultural history and evolution of humanity.<ref>{{cite news |title=First human culture lasted 20,000 years longer than thought |url=https://phys.org/news/2021-01-human-culture-years-longer-thought.html |access-date=13 February 2021 |work=phys.org |language=en}}</ref><ref>{{cite journal |last1=Scerri |first1=Eleanor M. L. |last2=Niang |first2=Khady |last3=Candy |first3=Ian |last4=Blinkhorn |first4=James |last5=Mills |first5=William |last6=Cerasoni |first6=Jacopo N. |last7=Bateman |first7=Mark D. |last8=Crowther |first8=Alison |last9=Groucutt |first9=Huw S. |title=Continuity of the Middle Stone Age into the Holocene |journal=Scientific Reports |date=11 January 2021 |volume=11 |issue=1 |pages=70 |doi=10.1038/s41598-020-79418-4 |pmid=33431997 |pmc=7801626 |language=en |issn=2045-2322|doi-access=free }} [[File:CC-BY icon.svg|50px]] Available under [https://creativecommons.org/licenses/by/4.0/ CC BY 4.0].</ref> In some cases cultural factors may be intertwined with genetic and environmental factors.