Pääbo's seminal work provides a basis for explaining what makes us uniquely human (1)

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... can also leave DNA in fossils, forcing scientists to learn how to isolate these genes (1). However, Dr. Paabo used the latest technology available to sequence DNA (Fig.1). When he needed more bones, he went the hard route of obtaining fossil fragments from other countries and designed "clean rooms," or laboratories with high standards of cleanliness that protected the specimens from contamination (1). ...