Scholars have long debated the origins of the House of Piast, Poland's first royal dynasty, who ruled the nation from the tenth through the fourteenth century. Some believe they were Slavic nobles, others Moravian exiles, and still others say they were Viking warriors. The Conversation reports on new DNA analysis that has revealed shocking new information concerning the Piasts' genetic background that might potentially rewrite history. Researchers led by molecular biologist Marek Figlerowicz of Poznań University of Technology extracted DNA from 33 individuals, 30 men and three women, belonging to the Piast dynasty. Most of the deceased, who lived between...