New clues have emerged in what could be described as the world's oldest murder case: that of Oetzi the Iceman, whose 5,300 year old body was revealed frozen in the Italian Alps in 1991. The study reveals the fuller genetic picture as laid out in the nuclei of Oetzi's cells. Oetzi's mitochondrial DNA had previously discovered some hints of his genesis when it was fully sequenced in 2008.
According to Albert Zink, from the Eurac Institute for Mummies and the Iceman in Bolzano, Italy, the nuclear DNA learn was a great leap onward in one of the most extensively studied specimens in science. It is most likely this stage of transition to an agrarian society that explains Oetzi's lactose bigotry.