PASQUALE SORRENTINO / SCIENCE PHOTO LIBRARY PASQUALE SORRENTINO / SCIENCE PHOTO LIBRARY
DNA analysis of Peruvian mummy. Researcher using a centrifuge during DNA analysis of a mummy's tooth. DNA (deoxyribonucleic acid) can sometimes be recovered from ancient human remains, and studied to help researchers understand the genetics of the pre-Hispanic population of Peru compared to today's population. Mummification, where the remains are preserved by dessication in a dry climate, helps preserve the DNA. Photographed at the University of Rome Tor Vergata, Rome, Italy.
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