Extracting ancient DNA from artifacts reveals human history.

Scientists have successfully extracted human DNA from a Paleolithic pendant, revealing that it belonged to a Siberian woman who lived around 25,000 years ago. The pendant was discovered in Denisova Cave in southern Siberia, which is known for its human occupation by Neanderthals, Denisovans, and modern humans. The new DNA extraction method used was nondestructive and involved submerging the artifact in a buffer bath of sodium phosphate. The researchers believe this method could be used on other ancient artifacts, but caution that proper equipment must be worn to avoid cross-contamination.