Fire As an Engineering Tool of Early Modern Humans

@article{Brown2009FireAA,
  title={Fire As an Engineering Tool of Early Modern Humans},
  author={K S Brown and Curtis W. Marean and Andy I. R. Herries and Zenobia Jacobs and Chantal Tribolo and David Braun and David L. Roberts and Michael Christian Meyer and Jocelyn Bernatchez},
  journal={Science},
  year={2009},
  volume={325},
  pages={859 - 862}
}
Friendly Fire Hints of the use of more advanced materials by humans, including symbolic marking and jewelry, appear about 75,000 years ago or so in Africa. Brown et al. (p. 859; see the Perspective by Webb and Domanski) now show that these early modern humans were also experimenting with the use of fire for improved processing of materials. Replication experiments and analysis of artifacts suggest that humans in South Africa at this time, and perhaps earlier, systematically heated stone… 
Fire and Stone
TLDR
On page 859 of this issue, Brown et al. show that in coastal South Africa, the deliberate use of controlled heat treatment of stone materials dates back at least 72,000 years (and perhaps as long as 164, thousands years), predating its use outside Africa.
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Humans were regularly heat‐treating stone tool raw materials as early as 130 thousand years ago. The late Middle Stone Age (MSA) and Late Stone Age (LSA) of South Africa’s Western Cape region
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