Using mummy head lice cement gathered from South American mummified remains dating back 1,500-2,000 years, the study’s new analysis technique can now be used when recovered bodies are void of teeth and bones. Natural History, England, and the University of Copenhagen, Denmark. Until the development of this new way of analyzing ancient DNA, archaeologists were restricted to samples gathered only from bone or tooth fragments . The new DNA technique was useful because most of the sampled mummies were exposed to extremely cold temperatures when they died. Lice depend on the host's head heat to gestate their eggs and they...