She died 11,500 years ago at the tender age of six weeks in what is now the interior of Alaska. Dubbed “Sunrise Girl-child” by the local indigenous people, the remains of the Ice Age infant—uncovered at an archaeological dig in 2013—contained traces of DNA, allowing scientists to perform a full genomic analysis. Incredibly, this baby girl belonged to a previously unknown population of ancient Native Americans—a discovery that’s changing what we know about the continent’s first people.