Scientists traced migrations of ancient inhabitants of the Andes thanks to louses

The international group of scientists for the first time took human DNA from "cement" on the heads of ancient mummies. This cement was formed of the secret allocated by females of louses more densely to attach the eggs to hair, reports Molecular Biology and Evolution. Scientists surveyed six mummies from the Andes. Them found in the territory which is occupied now by San-Khuan (the central part Western Argentina). In hair of mummies the hardened louses remained. Results of scientific work showed that concentration of DNA in "cement" emitted with them is twice higher, than in bones, and four times above, than in blood...