PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES—Researchers present evidence of Neolithic kinship and violence based on remains from a mass grave in Poland. The Globular Amphora culture existed during this time in Europe, but little is known about their relations with the neighboring Corded Ware culture. Hannes Schroeder, Niels N. Johannsen, Morten E. Allentoft, and colleagues sequenced the genomes of 15 individuals found in a mass grave excavated in Koszyce, Poland, that dates to approximately 2880-2776 BCE. According to the authors, the study* supports the notion that Neolithic violence was a common response to population pressure and competition for resources. ______________________________________________________*”Unraveling ancestry, kinship, and violence in a Late Neolithic mass grave,” by Hannes Schroeder et al.