Rare set of varied factors triggered Black Death - Ars Technica

Rare set of varied factors triggered Black Death  Ars TechnicaClimate-driven changes in Mediterranean grain trade mitigated famine but introduced the Black Death to medieval Europe | Communications Earth & Environment  NatureVolcanic eruption led to the Black Death, new research suggests  CNNHow volcanoes upend the story of what sparked the Black Death  The Washington PostVolcanic eruption may have catalyzed the plague's arrival in Europe: study &