Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.
February 2024 in “Journal of Geochemical Exploration” Selenium levels in soil, crops, and human hair in Northwest China are within safe limits.
Wild African goats have genetic adaptations for surviving harsh desert conditions.
55 citations,
December 2021 in “BMC Veterinary Research” Certain genes in Iranian sheep are linked to wool production and heat adaptation.
72 citations,
February 2011 in “American Journal of Biological Anthropology” The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.