DNA tests on the skeletons proved that the burial of 41 people from a pastoral community in Croatia 6,200 years ago was a massacre. DNA, archaeological and skeletal evidence uncovered a massacre and indiscriminate burial.

"This is the oldest known case of indiscriminate mass killing that we know of," says James Ahern, a University of Washington professor in the Department of Anthropology. Men and women were found at the site, and there was no sexual bias, as the number of males and females was almost equal in number.